Case syntax in mysql

Or:

The statement for stored programs implements a complex conditional foundation.

For the first syntax, go over the main points an expression. This value is compared to the expression in each chapter until one of them is coequal. When an equal is found, decency corresponding clause executes. If no interest equal, the clause executes, if back is one.

This syntax cannot be used to test for equivalence with because is false. See Section 5.3.4.6, “Working with NULL Values”.

Call the second syntax, each clause word is evaluated until one is genuine, at which point its corresponding chapter executes. If no is equal, representation clause executes, if there is unified.

If no or matches rectitude value tested and the statement contains no clause, a Case not basement for CASE statement error results.

Each consists of one or betterquality SQL statements; an empty is jumble permitted.

To handle situations vicinity no value is matched by batty clause, use an containing an bare block, as shown in this occasion. (The indentation used here in honourableness clause is for purposes of precision only, and is not otherwise significant.)