如何將這些查詢合並為一個？

Question

我想知道是否有辦法將所有這些查詢合並為一個。

$sql = "SELECT COUNT(status) as closedtickets FROM tickets WHERE status = 'c'
        SELECT COUNT(status) as pendingtickets FROM tickets WHERE status = 'p'
        SELECT COUNT(status) as onholdtickets FROM tickets WHERE status = 'h'
        SELECT COUNT(status) as opentickets FROM tickets WHERE status = 'o'";

謝謝，任何幫助將不勝感激。

Answer 1

您可以使用條件聚合簡化查詢：

SELECT SUM(status = 'c') as closedtickets,
       SUM(status = 'p'),
       SUM(status = 'h'),
       SUM(status = 'o')
FROM tickets;