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Top 50 Sql Tricky Interview Questions
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Book Synopsis Top 50 SQL Tricky Interview Questions by : Knowledge Powerhouse
Download or read book Top 50 SQL Tricky Interview Questions written by Knowledge Powerhouse and published by . This book was released on 2016-12-11 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contains tricky and nasty SQL interview questions that an interviewer asks. It is a compilation of advanced SQL interview questions after attending dozens of technical interviews in top-notch companies like- Oracle, Google, Ebay, Amazon etc.Each question is accompanied with an answer because you want to save your time while preparing for an interview.The difficulty rating on these Questions varies from a Junior level programmer to Architect level. Sample Questions are:How can we retrieve alternate records from a table in Oracle?Given a list of student names and grade. Write a query to print a comma separated list of student names in a grade.Write SQL Query to get Student Name and number of Students in same grade.Write SQL query to delete duplicate rows in a table?Write SQL query to get the second highest salary among all Employees?Write SQL Query to get Employee Name, Manager ID and number of employees in the department?Write SQL query to get the nth highest salary among all Employees.Given an Employee table with Manager_ID as column, print First name, Manager ID and Level of employees in Organization Structure?Why is the difference between NVL and NVL2 functions in SQL?What is the difference between UNION and UNION ALL?What are the reasons for de-normalizing the data?What is a Pseudocolumn?How can you find 10 employees with Odd number as Employee ID?What is the difference between DELETE and TRUNCATE in SQL?Which SQL feature can be used to view data in a table sequentially?What are the differences between CASE and DECODE in SQL?Write a SQL Query to get the Quarter from date.http://www.knowledgepowerhouse.com
Book Synopsis 1000 SQL Interview Questions and Answers by : Vamsee Puligadda
Download or read book 1000 SQL Interview Questions and Answers written by Vamsee Puligadda and published by Vamsee Puligadda. This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Knowledge for Free... Get that job, you aspire for! Want to switch to that high paying job? Or are you already been preparing hard to give interview the next weekend? Do you know how many people get rejected in interviews by preparing only concepts but not focusing on actually which questions will be asked in the interview? Don't be that person this time. This is the most comprehensive Structured Query Language (SQL) interview questions book that you can ever find out. It contains: 1000 most frequently asked and important SQL interview questions and answers Wide range of questions which cover not only basics in SQL but also most advanced and complex questions which will help freshers, experienced professionals, senior developers, testers to crack their interviews.
Book Synopsis SQL Server Interview Questions and Answers by : Vinod Kumar
Download or read book SQL Server Interview Questions and Answers written by Vinod Kumar and published by Independently Published. This book was released on 2021-03 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt: As representatives from the IT community, all of us have had our own experiences of attending interviews - clearing or close to clearing and sometimes with tons of questions and doubts failing miserably. These stories are in the most pleasant or not so pleasant memories of our mind and we will assure you this book will kindle those memories for sure. We have taken tons of interviews and most of the interviews are not revolving around how deep technical and internals you know about the subject - but it revolves around how good you are with the basics.To clear an interview, one doesn't need to know inside-out of a subject, and subjects like "SQL Server" so vast that every single day we learn something new with this product, and even a complete lifetime will fly off if we keep doing this. Again, the various roles one can get into for products like SQL Server are from Database Developer, Database Modelers, Database Architect, Database Administrator and many more. Hence, this book is geared towards demystifying and a refresher for memories on the fundamentals which sometimes are the most important things to clear any type of interview for any role. Some of the concepts discussed are generic and are not tied to any specific version of SQL Server, but most of it the new features introduced with SQL Server have been included in this book.This book is not a shortcut or a sure to crack interview guide but this book gets you prepared in an organized manner. Let us also assure you this is neither a completely comprehensive guide but surely is a great starter nevertheless. Use this to guide you and be mentally prepared for the big day. When faced with this big day, we get overwhelmed and confused about where to start our preparation. And this book is just that secret recipe in your arsenal to get geared up. Sometimes these basics will help you narrow to a solution quickly when given a scenario.Now this book's flow is "Question & Answer" mode from start till the end to help you grasp the concepts faster and to the point. Once you get an understanding of concepts, then if we are twisted with the concept in a scenario it becomes easy to solve them. Most companies have a typical way to do interviews which are based on the scenario as per their environment and these are just combinations of the concepts to fit their need and SLA.Though each of these chapters is bucketed for convenience we highly recommend reading each of the sections nevertheless irrespective of the roles you might be doing as each of the sections have some interesting trivia's working with SQL Server. In the industry, the role of accidental DBA's especially with SQL Server is so common. Hence if you have performed the role of DBA for a short stink and want to brush-up your fundamentals then the respective sections will be a great skim.
Book Synopsis SQL Interview Questions by : Prasad Kulkarni
Download or read book SQL Interview Questions written by Prasad Kulkarni and published by BPB Publications. This book was released on 2019-11-05 with total page 343 pages. Available in PDF, EPUB and Kindle. Book excerpt: Let us break the SQL interview with the help of SQL Server interview questions. DESCRIPTION This book gives you a complete idea about the SQL database. It starts from a very basic concept like what is a database, its usage, types, creation, and data storage, security, sorting, and searching for a stored procedure. This book is a complete set of interview breaking questions and answers with live examples and plenty of screenshots. This book takes you on a journey to mastering the SQL database, including SQL datatypes, functions, triggers, and stored procedures. This book also covers the latest and new features of SQL 2016, 2017 and 2019 CTP with examples. In the beginner section, we start with very basic concepts like what is a database, why to use a database, different types of database types, what is SQL, its usages, advantage and disadvantages, SQL datatypes, its different operators and how to use them with samples. In the intermediate section, we will learn about the different SQL functions, SQL Joins (used to fetch values from multiple SQL tables) and SQL DDL, DCL, and DTL commands.Ê (About the last chapters) This is the advanced section of the book where we have provided an explanation of the SQL stored procedure, triggers and SQL view concepts, additionally, we have covered SQL core concepts like keys, indexes, injections and constraints. We have also introduced cutting-edge concepts like SSRS, SSIS, SQL Cloud database (Azure), JSON Support and a list of the new features of SQL 2016, 2017, CTP-2019 with SQL performance improvement tips. Finally, we have ended the book with a series of random SQL questions and answers. KEY FEATURESÊÊ Database Basic Concepts SQL Fundamentals DDMS, SQL Statements, and Clauses SQL Operators, Datatypes, and Keywords SQL Functions, Wildcards and Dates SQL Joins and CASE Statement SQL DDL, DCL, and DTL Statements SQL Stored procedures, Triggers, Views, and Transactions SQL Keys, Indexes, Injection, and Constraints SSRS, SSIS, SQL Cloud database (Azure), and JSON Support New features of SQL 2016, 2017, and 2019 SQL Performance Improvement Tips Fuzzy Interview Questions and Answers WHAT WILL YOU LEARNÊÊ After reading this book, you will be able to understand SQL database concepts, handle core database activities like data security, searching, migration, and sorting. You will be able to handle the database transactions, use different SQL datatypes, functions, triggers, and stored procedures to save and retrieve data from the database. You will also be able to understand advanced SQL concepts like SQL reporting services, integration services, cloud database and new features from the latest SQL versions like 2016, 2017, and 2019. WHO THIS BOOK IS FORÊÊ This book is built in such a way that it is useful for all categories such as technical or non-technical readers. This book is perfect. If you are a fresher and you want to learn about SQL, or if you are a teacher and you want to spread SQL knowledge, this book is very helpful. If you want to crack the database interview or if you are working as a DBA and you want to upgrade your knowledge, or if you are backend developer, database tester, performance optimizer, or if your role is that of a database admin, SQL developer, data analyst, mobile app developer or if you are working on core SQL concepts, this book is just right for you. This book is very useful as it contains many simple real-time scenarios for each concept. All functionalities are explained with real SQL screenshots and database records. Table of Contents 1. Database and SQL Basics 2. DDMS SQL Statements and Clauses 3. SQL Operators, Keywords, and Datatypes 4. SQL Operators 5. SQL Functions, Wildcards, and Dates 6. SQL Joins and CASE Statement 7. SQL DDL, DCL, and DTL Statements 8. SQL Stored Procedures, Triggers, Views, and Transactions 9. SQL Keys, Indexes, Injections, and Constraints 10. SSRS, SSIS, SQL Cloud database (Azure), and JSON Support 11. New features of SQL 2016, 2017, and 2019 12. SQL Performance Improvement Tips and Fuzzy Interview Questions
Book Synopsis Joe Celko's SQL Puzzles and Answers by : Joe Celko
Download or read book Joe Celko's SQL Puzzles and Answers written by Joe Celko and published by Elsevier. This book was released on 2006-10-09 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt: Joe Celko's SQL Puzzles and Answers, Second Edition, challenges you with his trickiest puzzles and then helps solve them with a variety of solutions and explanations. Author Joe Celko demonstrates the thought processes that are involved in attacking a problem from an SQL perspective to help advanced database programmers solve the puzzles you frequently face. These techniques not only help with the puzzle at hand, but also help develop the mindset needed to solve the many difficult SQL puzzles you face every day. This updated edition features many new puzzles; dozens of new solutions to puzzles; and new chapters on temporal query puzzles and common misconceptions about SQL and RDBMS that leads to problems. This book is recommended for database programmers with a good knowledge of SQL. A great collection of tricky SQL puzzles with a variety of solutions and explanations Uses the proven format of puzzles and solutions to provide a user-friendly, practical look into SQL programming problems - many of which will help users solve their own problems New edition features: Many new puzzles added!, Dozens of new solutions to puzzles, and using features in SQL-99, Code is edited to conform to SQL STYLE rules, New chapter on temporal query puzzles, New chapter on common misconceptions about SQL and RDBMS that leads to problems
Book Synopsis T-SQL Window Functions by : Itzik Ben-Gan
Download or read book T-SQL Window Functions written by Itzik Ben-Gan and published by Microsoft Press. This book was released on 2019-10-18 with total page 711 pages. Available in PDF, EPUB and Kindle. Book excerpt: Use window functions to write simpler, better, more efficient T-SQL queries Most T-SQL developers recognize the value of window functions for data analysis calculations. But they can do far more, and recent optimizations make them even more powerful. In T-SQL Window Functions, renowned T-SQL expert Itzik Ben-Gan introduces breakthrough techniques for using them to handle many common T-SQL querying tasks with unprecedented elegance and power. Using extensive code examples, he guides you through window aggregate, ranking, distribution, offset, and ordered set functions. You’ll find a detailed section on optimization, plus an extensive collection of business solutions — including novel techniques available in no other book. Microsoft MVP Itzik Ben-Gan shows how to: • Use window functions to improve queries you previously built with predicates • Master essential SQL windowing concepts, and efficiently design window functions • Effectively utilize partitioning, ordering, and framing • Gain practical in-depth insight into window aggregate, ranking, offset, and statistical functions • Understand how the SQL standard supports ordered set functions, and find working solutions for functions not yet available in the language • Preview advanced Row Pattern Recognition (RPR) data analysis techniques • Optimize window functions in SQL Server and Azure SQL Database, making the most of indexing, parallelism, and more • Discover a full library of window function solutions for common business problems About This Book • For developers, DBAs, data analysts, data scientists, BI professionals, and power users familiar with T-SQL queries • Addresses any edition of the SQL Server 2019 database engine or later, as well as Azure SQL Database Get all code samples at: MicrosoftPressStore.com/TSQLWindowFunctions/downloads
Book Synopsis TOP 30 SQL Interview Coding Tasks by : Matthew Urban
Download or read book TOP 30 SQL Interview Coding Tasks written by Matthew Urban and published by net-boss. This book was released on with total page 57 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Top 50 MySQL Interview Questions and Answers by : Knowledge Powerhouse
Download or read book Top 50 MySQL Interview Questions and Answers written by Knowledge Powerhouse and published by . This book was released on 2016-12-23 with total page 41 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contains basic to expert level MySQL interview questions that an interviewer asks. Each question is accompanied with an answer so that you can prepare for job interview in short time. We have compiled this list after attending dozens of technical interviews in top-notch companies like- Google, Facebook, Netflix, Amazon etc.Often, these questions and concepts are used in our daily programming work. But these are most helpful when an Interviewer is trying to test your deep knowledge of MySQL.The difficulty rating on these Questions varies from a Fresher level software programmer to a Senior software programmer. Once you go through them in the first pass, mark the questions that you could not answer by yourself. Then, in second pass go through only the difficult questions. After going through this book 2-3 times, you will be well prepared to face a technical interview on MySQL for an experienced programmer. Some of the questions are:How will you calculate the number of days between two dates in MySQL?What are the different types of Triggers in MySQL?What are the differences between Heap table and temporary table in MySQL?What is a Heap table in MySQL?What is the difference between BLOB and TEXT data type in MySQL?What will happen when AUTO_INVREMENT on an INTEGER column reaches MAX_VALUE in MySQL?What are the advantages of MySQL as compared with Oracle DB?What are the disadvantages of MySQL?What is the difference between CHAR and VARCHAR datatype in MySQL?What is the use of 'i_am_a_dummy flag' in MySQL?How can we get current date and time in MySQL?What is the difference between timestamp in Unix and MySQL?How will you limit a MySQL query to display only top 10 rows?What is automatic initialization and updating for TIMESTAMP in a MySQL table?How can we get the list of all the indexes on a table?What is SAVEPOINT in MySQL?17. What is the difference between ROLLBACK TO SAVEPOINT and RELEASE SAVEPOINT?How will you search for a String in MySQL column?How can we find the version of the MySQL server and the name of the current database by SELECT query?What is the use of IFNULL() operator in MySQL?How will you check if a table exists in MySQL?How will you see the structure of a table in MySQL?What are the objects that can be created by CREATE statement in MySQL?24. How will you see the current user logged into MySQL connection?How can you copy the structure of a table into another table without copying the data?What is the difference between Batch and Interactive modes of MySQL?How can we get a random number between 1 and 100 in MySQL?What is the difference between Primary key and Candidate key?What is a Federated table in MySQL?How will you get the comma separated values for a column in a MySQL Group query?How can we get the results from a table in a random order in MySQL?How can we prevent duplicate records in a MySQL table?How will you eliminate duplicate values from a query result in MySQL?How will you get the size of data in a MySQL table?What is the option in Amazon Web Services for MySQL?How can we manage multiple MySQL servers?How will you migrate your SQL Server database to MySQL?What is the difference between MySQL and Oracle?What is the order of privileges in MySQL?Is it ok to mention a table name in lower case while creation and in uppercase while retrieving data from MySQL DB?Why this query does not work in MySQL?What is mysqldump?What is the limitation of mysqldump?Can we run Javascript or Python code in MySQL?What are user-defined variables in MySQL?How will you optimize a SELECT query in MySQL?What are the different optimization techniques in MySQL?How can we optimize INSERT query in MySQL?How will you make MySQL system secure against attackers?How can you protect your MySQL server against Denial of Service attacks?
Book Synopsis Microsoft SQL Server Interview Questions by : Chandan Sinha
Download or read book Microsoft SQL Server Interview Questions written by Chandan Sinha and published by Chandan Kumar Sinha. This book was released on 2015-07-30 with total page 57 pages. Available in PDF, EPUB and Kindle. Book excerpt: Microsoft SQL Server Interview Questions comprises of SQL questions and their comprehensive answers including theoretical concepts as well as example SQL queries wherever possible. It has lots of latest and important SQL interview questions which consists not only of theoretical explanations but most essentially its practical implementations. Most of these questions are based on real life interview experiences from multiple sources. This book is an indispensable resource for Microsoft .Net Developers. It will serve as a useful resource to anyone who faces interviews in SQL (developers of any platform - .Net, JAVA, C++, etc), as well as Database Administrators.
Book Synopsis Sql Server - Interview Questions by : Shivprasad Koirala
Download or read book Sql Server - Interview Questions written by Shivprasad Koirala and published by . This book was released on 2005-05 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Top 200 Data Engineer Interview Questions and Answers by : Knowledge Powerhouse
Download or read book Top 200 Data Engineer Interview Questions and Answers written by Knowledge Powerhouse and published by . This book was released on 2017-03-19 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt: Top 200 Data Engineer Interview Questions Big Data and Data Science are the most popular technology trends. There is a growing demand for Data Engineer job in technology companies. This book contains technical interview questions that an interviewer asks for Data Engineer position. Each question is accompanied with an answer so that you can prepare for job interview in short time. The book contains questions on Apache Hadoop, Hive, Spark, SQL and MySQL. It is a combination of our five other books. We have compiled this list after attending dozens of technical interviews in top-notch companies like- Airbnb, Netflix, Amazon etc.Often, these questions and concepts are used in our daily work. But these are most helpful when an Interviewer is trying to test your deep knowledge of Big Data topics like- Hadoop, Hive, Spark, SQL, MySQL etc. What are the Big Data topics covered in this book? We cover a wide variety of Big Data and Data Science topics in this book. Some of the topics are Apache Hadoop, Hive, Spark, SQL, MySql etc. How will this book help me? By reading this book, you do not have to spend time searching the Internet for Data Engineer interview questions. We have already compiled the list of the most popular and the latest Data Engineer Interview questions. Are there answers in this book? Yes, in this book each question is followed by an answer. So you can save time in interview preparation. What is the best way of reading this book? You have to first do a slow reading of all the questions in this book. Once you go through them in the first pass, mark the questions that you could not answer by yourself. Then, in second pass go through only the difficult questions. After going through this book 2-3 times, you will be well prepared to face a technical interview for a Data Engineer position. What is the level of questions in this book? This book contains questions that are good for a beginner Data engineer to a senior Data engineer. The difficulty level of question varies in the book from Fresher to a Seasoned professional. What are the sample questions in this book? What is the difference between ROLLBACK TO SAVEPOINT and RELEASE SAVEPOINT? How will you see the current user logged into MySQL connection? Can we create multiple tables in Hive for a data file? Can we use Hive for Online Transaction Processing (OLTP) systems? Can we use same name for a TABLE and VIEW in Hive? How can we get a random number between 1 and 100 in MySQL? How can you copy the structure of a table into another table without copying the data? How can you find 10 employees with Odd number as Employee ID? How does CONCAT function work in Hive? How will you change the data type of a column in Hive? How will you check if a file exists in HDFS? How will you check if a table exists in MySQL? How will you run Unix commands from Hive? How will you search for a String in MySQL column? How will you see the structure of a table in MySQL? How will you select the storage level in Apache Spark? How will you synchronize the changes made to a file in Distributed Cache in Hadoop? If we set Replication factor 3 for a file, does it mean any computation will also take place 3 times? Is it safe to use ROWID to locate a record in Oracle SQL queries? What are different Persistence levels in Apache Spark? What are the common Transformations in Apache Spark? http://www.knowledgepowerhouse.com
Book Synopsis Data Analysis Using SQL and Excel by : Gordon S. Linoff
Download or read book Data Analysis Using SQL and Excel written by Gordon S. Linoff and published by John Wiley & Sons. This book was released on 2010-09-16 with total page 698 pages. Available in PDF, EPUB and Kindle. Book excerpt: Useful business analysis requires you to effectively transform data into actionable information. This book helps you use SQL and Excel to extract business information from relational databases and use that data to define business dimensions, store transactions about customers, produce results, and more. Each chapter explains when and why to perform a particular type of business analysis in order to obtain useful results, how to design and perform the analysis using SQL and Excel, and what the results should look like.
Download or read book Head First SQL written by Lynn Beighley and published by "O'Reilly Media, Inc.". This book was released on 2007-08-28 with total page 607 pages. Available in PDF, EPUB and Kindle. Book excerpt: With its visually rich format designed for the way the brain works, this series of engaging narrative lessons that build on each other gives readers hands-on experience working with the SQL database language.
Book Synopsis Top 50 Amazon AWS Interview Questions by : Knowledge Powerhouse
Download or read book Top 50 Amazon AWS Interview Questions written by Knowledge Powerhouse and published by . This book was released on 2016-12-11 with total page 43 pages. Available in PDF, EPUB and Kindle. Book excerpt: Amazon Web Services is the hottest technology in software. It is the new architecture on which very few books have been written. If you are aiming to get a job in companies with AWS based architecture like- Netflix, Amazon etc. then this book can help you prepare for the technical interview.This books also covers Architect level information in Q&A format for easy grasp of the concept.This book helps you in understanding the deep concepts behind AWS in a Q&A format.We keep revising this book from time to time to keep it up to date with the latest changes in Amazon Web Services (AWS) world.Sample Questions are:How can you failover gracefully in AWS?What is the use of Availability Zones in AWS?Why AWS systems are built on "Design to Fail" approach?What are the best practices to build a resilient system in AWS?What are the tools in AWS that can be used for creating a system based on "Design to Fail" principle?How can we build a Scalable system in AWS?What are the advantages of messaging queues to decouple components?How can we implement Message Queue based system in AWS?What are the different ways to implement Elasticity in AWS?What are the benefits of bootstrapping instances in AWS?What are the best practices to Automate deployment in AWS?How will you automate your software infrastructure in AWS?What are the AWS specific techniques for parallelization of software work?Why it is recommended to keep dynamic data closer to the compute and static data closer to the end user in Cloud computing?What are the features in AWS for keeping static data closer to end user?What are the best practices to ensure the security of an application in cloud?Why encryption should be used in Amazon S3?What are the best practices of Software Security in Cloud?What is the difference between Stop and Terminate an Amazon EC2 instance?What are the main uses of Amazon Elastic Compute Cloud (EC2)?What is Auto-scaling? How does Auto-scaling work in AWS?What automation tools can be used to create new servers in AWS?How is Amazon Machine Image (AMI) and an Amazon Instance are related?What key components of Amazon Web Service (AWS) do you use in your project?
Book Synopsis SQL Practice Problems by : Sylvia Moestl Vasilik
Download or read book SQL Practice Problems written by Sylvia Moestl Vasilik and published by Createspace Independent Publishing Platform. This book was released on 2016-11-09 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt: Real-world practice problems to bring your SQL skills to the next level It's easy to find basic SQL syntax and keyword information online. What's hard to find is challenging, well-designed, real-world problems--the type of problems that come up all the time when you're dealing with data. Learning how to solve these problems will give you the skill and confidence to step up in your career. With SQL Practice Problems, you can get that level of experience by solving sets of targeted problems. These aren't just problems designed to give an example of specific syntax, or keyword. These are the common problems you run into all the time when you deal with data. You will get real world practice, with real world data. I'll teach you how to "think" in SQL, how to analyze data problems, figure out the fundamentals, and work towards a solution that you can be proud of. It contains challenging problems, that hone your ability to write high quality SQL code. What do you get when you buy SQL Practice Problems? You get instructions on how set up MS SQL Server Express Edition 2016 and SQL Server Management Studio 2016, both free downloads. Almost all the SQL presented here works for previous versions of MS SQLServer, and any exceptions are highlighted. You'll also get a customized sample database, with video walk-through instructions on how to set it up on your computer. And of course, you get the actual practice problems - 57 problems that you work through step-by-step. There are targeted hints if you need them that help guide you through the question. For the more complex questions there are multiple levels of hints. Each answer comes with a short, targeted discussion section with alternative answers and tips on usage and good programming practice. What kind of problems are there in SQL Practice Problems? SQL Practice Problems has data analysis and reporting oriented challenges that are designed to step you through introductory, intermediate and advanced SQL Select statements, with a learn-by-doing technique. Most textbooks and courses have some practice problems. But most often, they're used just to illustrate a particular piece of syntax, with no filtering on what's most useful. What you'll get with SQL Practice Problems is the problems that illustrate some the most common challenges you'll run into with data, and the best, most useful techniques to solve them. These practice problems involve only Select statements, used for data analysis and reporting, and not statements to modify data (insert, delete, update), or to create stored procedures. About the author: Hi, my name is Sylvia Moestl Vasilik. I've been a database programmer and engineer for more than 15 years, working at top organizations like Expedia, Microsoft, T-Mobile, and the Gates Foundation. In 2015, I was teaching a SQL Server Certificate course at the University of Washington Continuing Education. It was a 10 week course, and my students paid more than $1000 for it. My students learned the basics of SQL, most of the keywords, and worked through practice problems every week of the course. But because of the emphasis on getting a broad overview of all features of SQL, we didn't spend enough time on the types of SQL that's used 95% of the time--intermediate and advanced Select statements. After the course was over, some of my students emailed me to ask where they could get more practice. That's when I was inspired to start work on this book.
Book Synopsis Joe Celko's Thinking in Sets: Auxiliary, Temporal, and Virtual Tables in SQL by : Joe Celko
Download or read book Joe Celko's Thinking in Sets: Auxiliary, Temporal, and Virtual Tables in SQL written by Joe Celko and published by Morgan Kaufmann. This book was released on 2008-01-22 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt: Perfectly intelligent programmers often struggle when forced to work with SQL. Why? Joe Celko believes the problem lies with their procedural programming mindset, which keeps them from taking full advantage of the power of declarative languages. The result is overly complex and inefficient code, not to mention lost productivity. This book will change the way you think about the problems you solve with SQL programs.. Focusing on three key table-based techniques, Celko reveals their power through detailed examples and clear explanations. As you master these techniques, you’ll find you are able to conceptualize problems as rooted in sets and solvable through declarative programming. Before long, you’ll be coding more quickly, writing more efficient code, and applying the full power of SQL • Filled with the insights of one of the world’s leading SQL authorities - noted for his knowledge and his ability to teach what he knows. • Focuses on auxiliary tables (for computing functions and other values by joins), temporal tables (for temporal queries, historical data, and audit information), and virtual tables (for improved performance). • Presents clear guidance for selecting and correctly applying the right table technique.
Book Synopsis Top 50 Operating System Interview Questions & Answers by : Knowledge Powerhouse
Download or read book Top 50 Operating System Interview Questions & Answers written by Knowledge Powerhouse and published by Independently Published. This book was released on 2018-09-11 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: Top 50 Operating System Interview Questions This book contains Operating System interview questions that an interviewer asks. It is a compilation of easy to advanced Operating System interview questions after attending dozens of technical interviews in top-notch companies like- Oracle, Cisco, IBM, etc. Each question is accompanied with an answer so that you can prepare for job interview in short time. Often, these questions and concepts are used in our daily programming work. But these are most helpful when an Interviewer is trying to test your deep knowledge of Operating System concepts. How will this book help me? By reading this book, you do not have to spend time searching the Internet for Operating System interview questions. We have already compiled the list of the most popular and the latest Operating System Interview questions. Are there answers in this book? Yes, in this book each question is followed by an answer. So you can save time in interview preparation. What is the best way of reading this book? You have to first do a slow reading of all the questions in this book. Once you go through them in the first pass, mark the questions that you could not answer by yourself. Then, in second pass go through only the difficult questions. After going through this book 2-3 times, you will be well prepared to face a technical interview for Software Engineer position in Operating System. What is the level of questions in this book? This book contains questions that are good for a Associate Software engineer to a Principal Software engineer. The difficulty level of question varies in the book from a Fresher to an Experienced professional. What are the sample questions in this book? What is a Real time system? What is Virtual memory in OS? What is multi processing in OS? What is a Time sharing system? What is a Thread in OS? What are the advantages of multi-threaded programming? What is FCFS in OS? What is Round Robin scheduling algorithm in OS? What is a Deadlock in OS? What are the necessary conditions for Deadlock to occur? What is Banker
