2
这个查询可能在mysql中吗?验证mysql查询是否为NULL
如果查询返回null,则set x = false
否则set x = true
查询
SET @s1 = (SELECT * FROM `wo_ticket_details_replay`
WHERE message NOT LIKE "[ SYSTEM%" AND `sv_number`='0715201569998')
CASE WHEN @s1 = NULL THEN
x = 'false'
ELSE
x = 'true'
END CASE;
双引号,'为空' – Drew
与双引号一样没用 –