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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, ... Result: Click "Run SQL" to...
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MySQL CASE expression is a control flow structure that allows you to add if-else logic to a query. Generally speaking, you can use the CASE expression anywhere that allows a valid expression e.g., SELECT, WHERE and ORDER BY clauses. The CASE expression has two forms: simple CASE and searched CASE.
CASE. WHEN search_condition THEN statement_list . [WHEN search_condition THEN statement_list] ... [ELSE statement_list] END CASE. The CASE statement for stored programs implements a complex conditional construct. Note. There is also a CASE operator, which differs from the CASE statement described here.
23 kwi 2024 · The CASE Function in MySQL allows using conditional logic within the queries. It evaluates the conditions and returns a value when a condition is met (like an if-then-else statement). It can be used with different statements like SELECT, WHERE, and ORDER BY clause based on its use and requirements. Some features of MySQL CASE function are shown ...
This tutorial shows you how to use the MySQL CASE statements, including simple CASE and searched CASE statement, in stored procedures.
CASE in MySQL is both a statement and an expression, where each usage is slightly different. As a statement, CASE works much like a switch statement and is useful in stored procedures, as shown in this example from the documentation (linked above):
In MySQL, the CASE statement is a powerful conditional expression that allows you to perform conditional logic within SQL queries. It provides a way to perform different actions based on different conditions, similar to the IF-THEN-ELSE structure in other programming languages.
