Question

I need to add an if/else stament inside a MySQL query but can’t get it to work.

Below is an example with pseudo-code of what I want to accomplish.

SELECT *
FROM calendar
WHERE calendar.alert = 1

IF calendar.repeat = 0 THEN HAVING calendar.UTC_1 > UNIX_TIMESTAMP();

ELSE "get all records regardless of calendar.repeat value";

END IF;

Any suggestions to make this happen? I couldn’t find the correct syntax for this MySQL IF ELSE.

Thanks for helping!

Answer 1

SELECT *
FROM calendar
WHERE calendar.alert = 1 
AND CASE 
WHEN `repeat` =0 THEN UTC_1 > UNIX_TIMESTAMP()
ELSE 1=1 END;

You can use IF-ELSE only inside the body of stored procedure/trigger. You can use IF(condition, value_if_condition_is_true, value_if_condition_is_false) in SELECT, but I prefer CASE(you can easily rewrite the query above to

 .... AND IF(`repeat` = 0, UTC_1>UNIX_TIMESTAMP(),1=1)