The CASE expression is used to define different results based on specified conditions in an SQL statement. The CASE expression goes through the conditions and stops at the first match (like an if …

Learn how to use the SQL `CASE` statement to implement conditional logic efficiently. Explore its syntax, use cases, best practices, and performance considerations.

Feb 12, 2026 · The SQL CASE statement is used to add conditional logic inside SQL queries. It checks conditions one by one and returns a value as soon as a matching condition is found.

Learn SQL CASE WHEN with practical examples. Master simple CASE, searched CASE, CASE with aggregates, and common patterns every SQL developer needs.

Mar 17, 2026 · The CASE WHEN statement in SQL is used to apply conditional logic directly within your queries. It allows you to return different values based on specific conditions, all within the context of a …

This tutorial shows you how to use two forms of SQL CASE expressions including simple CASE and searched CASE expressions.

May 17, 2025 · CASE statements are a way to add if-then logic to SQL SELECT queries. They test conditions and return different values based on the results. This makes queries more flexible and …

Nov 18, 2025 · Aggregate expressions that appear in WHEN arguments to a CASE expression are evaluated first, then provided to the CASE expression. For example, the following query produces a …

In this syntax, the CASE statement evaluates each WHEN condition in order, returning the corresponding result when a condition is true. If none of the conditions are true, the statement …

Jan 16, 2024 · In SQL, this construct is a vital tool for data analysis. In this article, you'll find real-world practical exercises using the CASE WHEN statement for data analysis. This statement enables …