mysql - MySQL 从单独的表中获取 count()

Question

我正在尝试通过MySQL单个查询获取三个不同表中的简单行数。这是我所拥有的：

SELECT count(s.`id`) AS c1,
       count(g.`id`) AS c2,
       count(r.`id`) AS c3
  FROM table1 s,
       table2 g,
       table3 r

但这不起作用，我认为它将所有三个总数相乘。谢谢您的帮助。

score 4 · Accepted Answer

如果表没有关系并且无法连接，请尝试以下操作：

SELECT
  (select count(id) from table1) as c1,
  (select count(id) from table2) as c2,
  (select count(id) from table3) as c3

1 回答 1