Question

我尝试发一个复杂的sql请求，请帮帮我。

我有这个要求：

SELECT count(id_order) as NbOrders
FROM ORDER
WHERE order.state = 3 
    and order.source = 1;

但是，我想在同一个请求中也有这个条件的铭文：

WHERE order.state != 3 
    AND order.source != 1

Answer 1

尝试做：

SELECT SUM(CASE 
           WHEN order.state = 3 AND order.source = 1 THEN 1 
           ELSE 0 END) AS equal,
       SUM(CASE 
           WHEN order.state <> 3 AND order.source <> 1 THEN 1 
           ELSE 0 END) AS different
FROM order;

这会为您提供第一列中order.state = 3 AND order.source = 1的计数第二列中order.state <> 3 AND order.source <> 1的计数。

我尝试制作一个复杂的SQL请求

1 个答案: