The next version of the CASE() function : CASE « Function « SQL / MySQL






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  3. CASE

The next version of the CASE() function

     
mysql>
CASE <expression>
WHEN <value> THEN <result>
[{WHEN <value> THEN <result>}...]
[ELSE <result>]
END
mysql>
mysql> SELECT CASE 10*2
    ->     WHEN 20 THEN '20 correct'
    ->     WHEN 30 THEN '30 correct'
    ->     WHEN 40 THEN '40 correct'
    -> END;
+---------------------------------------------------------------------------------------------------------+
| CASE 10*2
    WHEN 20 THEN '20 correct'
    WHEN 30 THEN '30 correct'
    WHEN 40 THEN '40 correct'
END |
+---------------------------------------------------------------------------------------------------------+
| 20 correct                                                                                              |
+---------------------------------------------------------------------------------------------------------+
1 row in set (0.00 sec)

mysql>
mysql>








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20.If ELSE is omitted, the null value is returned.