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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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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.
26 sty 2024 · The CASE-WHEN statement in MySQL 8 is a robust tool for building dynamic and responsive SQL queries. Varying from basic conditional output to more complex evaluations involving subqueries and joins, CASE-WHEN can help you derive nuanced insights from your data in an elegant fashion.
For the first syntax, case_value is an expression. This value is compared to the when_value expression in each WHEN clause until one of them is equal. When an equal when_value is found, the corresponding THEN clause statement_list executes.
This tutorial shows you how to use the MySQL CASE statements, including simple CASE and searched CASE statement, in stored procedures.
7 mar 2024 · This tutorial explains what is MySQL CASE Statement, when to use it, how to use it with update statement, and when statement in programs: The MySQL CASE statement is a conditional construct and it returns values against a given condition being evaluated as true or false.
25 maj 2024 · In MySQL, the CASE statement is used to apply a complex conditional construct in a stored program. This function is useful in -. It allows you to implement conditional logic directly within a query. This is invaluable for handling different scenarios and producing different results based on specified conditions.
