Question

我有表A和B，我想只获取表A中的行，其中user_id也在表B中，并且表B中的过期日期小于CURRENT_TIME + 6个月。

SELECT * from u_uzivatele JOIN bw_paid_orders
      ON u_uzivatele.id = bw_paid_orders.user_id 
WHERE bw_paid_orders.active_thru < NOW() + interval '6 months'

此查询执行此操作，但它返回A和B中的所有列，我只想从A中获取列。

Answer 1

你可以这样做：

SELECT u_uzivatele.* FROM u_uzivatele 
JOIN bw_paid_orders ON u_uzivatele.id = bw_paid_orders.user_id 
WHERE bw_paid_orders.active_thru < NOW() + interval '6 months'

从u_uzivatele获取所有列。或者如果你想要那里的列，则传递bw_paid_orders表。

Answer 2

SELECT a.* 
from u_uzivatele as a
JOIN bw_paid_orders b ON a.id = b.user_id 
WHERE b.active_thru < NOW() + interval '6 months

Answer 3

试试这个

SELECT a.* FROM u_uzivatele a JOIN bw_paid_orders b
      ON a.id = b.user_id 
WHERE b.active_thru < NOW() + INTERVAL '6 months'

JOIN后仅从一个表返回数据

3 个答案: