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This edition of SQL Practice Problems assumes that you have some basic background knowledge about relational databases and tables. However, I’ve added some beginner level questions to gradually introduce the various parts of the SQL Select statement for those with less experience in SQL.
15 wrz 2008 · 30 Answers. Sorted by: 2052. The CASE statement is the closest to IF in SQL and is supported on all versions of SQL Server. SELECT CAST( CASE. WHEN Obsolete = 'N' or InStock = 'Y' THEN 1. ELSE 0. END AS bit) as Saleable, * FROM Product. You only need to use the CAST operator if you want the result as a Boolean value.
SQL Practice Questions - Solution. For the following relation schema: employee(employee-name, street, city) works(employee-name, company-name, salary) company(company-name, city) manages(employee-name, manager-name) Give an expression in SQL for each of the following queries:
Complex SQL Queries Examples with answers : Following are some very important complex sql queries examples with answers.I have tried to explain each and every query in detail so that
The IF ELSE statement. When the condition in the IF clause evaluates to FALSE and you want to execute another statement block, you can use the ELSE clause. The following illustrates the IF ELSE statement: IF Boolean_expression.
6 mar 2024 · IF-THEN-ELSE Statement: The IF-THEN-ELSE statement allows developers to execute a block of code conditionally based on a specified condition. If the condition evaluates to true, the code inside the THEN block is executed; otherwise, the code inside the ELSE block is executed.
29 sie 2024 · Practice with 50 basic to advanced SQL queries commonly asked in interview questions, run them live, find answers, and secure your dream job.
