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IF
If the first argument is true, returns second argument. If the first argument is false or NULL, returns third argument.
Syntax
IF (val, iftrue, iffalse)
Arguments
- Any SQL objects
Return Type
The default return type depends on the type of arguments iftrue and iffalse. For example, if iftrue or iffalse result in an integer, the return type is an integer. If they are both strings, the return type is a string, and so on.
Examples
SELECT IF(0, 'a', 'b'), IF('1', 'a', 'b'), IF(NULL, 'a', 'b');
+-----------------+-------------------+--------------------+
| IF(0, 'a', 'b') | IF('1', 'a', 'b') | IF(NULL, 'a', 'b') |
+-----------------+-------------------+--------------------+
| b | a | b |
+-----------------+-------------------+--------------------+
