Learn how to use the SQL CASE statement to perform conditional logic in SQL. This article covers the simple CASE and the searched CASE statements, null values, custom logic, and best practices.

You can use an IF statement as an expression in your query, such as in the SELECT or WHERE clauses. For example, suppose you have a table called orders with columns id, customer_id, amount, and ...

This article discusses the "DROP IF EXISTS" statement available in SQL Server 2016 and later versions. "IF EXITS ... If we are using SQL Server 2015 or earlier than we need to ... Now execute the ...

Read this SQL tutorial to learn when to use SELECT, JOIN, subselects and UNION to access multiple tables with a single statement. It’s sometimes difficult to know which SQL syntax to use when ...