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Definition and Usage. The CASE statement goes through conditions and return a value when the first condition is met (like an IF-THEN-ELSE statement). So, once a condition is true, it will stop reading and return the result. If no conditions are true, it will return the value in the ELSE clause.
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Edit the SQL Statement, and click "Run SQL" to see the...
- Try It Yourself
In this tutorial, you will learn how to use the MySQL CASE expression to add if-else logic to SELECT, WHERE, and ORDER BY of a query.
7 sty 2013 · Using a SELECT statement with a searched CASE expression. Within a SELECT statement, the searched CASE expression allows for values to be replaced in the result set based on comparison values. The following example displays the list price as a text comment based on the price range for a product.
There is also a CASE operator, which differs from the CASE statement described here. See Section 14.5, “Flow Control Functions”. The CASE statement cannot have an ELSE NULL clause, and it is terminated with END CASE instead of END.
This tutorial shows you how to use the MySQL CASE statements, including simple CASE and searched CASE statement, in stored procedures.
It allows you to perform conditional operations based on specified conditions and return different values depending on whether the conditions are met or not. The CASE function is often used in conjunction with the SELECT statement to create more flexible and dynamic queries.
The CASE statement can be used in various SQL clauses, including SELECT, WHERE, ORDER BY, and HAVING. Syntax. The basic syntax of the CASE statement looks like this: CASE WHEN condition1 THEN result1 WHEN condition2 THEN result2 ... ELSE default_result END Here’s a breakdown of the components: CASE: The keyword that starts the CASE statement.
