如何将这些查询合并为一个？

Question

我想知道是否有办法将所有这些查询合并为一个。

$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'";

谢谢，任何帮助将不胜感激。

Answer 1

您可以使用条件聚合简化查询：

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