Question

我正在使用此代码：

SELECT *
  FROM admins, vips
  WHERE admins.Expired < CURDATE() + INTERVAL 3 DAY
    AND vips.Expired < CURDATE() + INTERVAL 3 DAY

我先是2行，后面是2行。但我只在“vips”表中获得了2行。为什么呢？

Answer 1

尝试为两个表指定*，如下所示：

SELECT admins.*, vips.*
FROM admins, vips
WHERE admins.Expired < CURDATE() + INTERVAL 3 DAY
AND vips.Expired < CURDATE() + INTERVAL 3 DAY

编辑：上面的答案没有帮助，你需要一个UNION SELECT：

SELECT * 
FROM (SELECT * FROM vips
    UNION
    SELECT * FROM admins) derivedTable       -- this is an alias of the subquery
WHERE Expired < CURDATE() + INTERVAL 3 DAY

从2个表中选择

1 个答案: