我有疑问
SELECT c.user_id,
(SELECT COUNT(*) FROM jos_findme_bestof b WHERE b.user_id = c.user_id) as bCount,
(SELECT COUNT(*) FROM jos_findme_pair p WHERE p.user_id = c.user_id) as pCount,
(SELECT COUNT(*) FROM jos_findme_style s WHERE s.user_id = c.user_id) as sCount,
FROM jos_findme c
如何使用 bCount + pCount + sCount 创建列？
谢谢
最佳答案
如果您想在查询中添加该列:
SELECT *,(bCount+pCount+sCount) as sumCount FROM(
SELECT c.user_id,
(SELECT COUNT(*) FROM jos_findme_bestof b WHERE b.user_id = c.user_id) as bCount,
(SELECT COUNT(*) FROM jos_findme_pair p WHERE p.user_id = c.user_id) as pCount,
(SELECT COUNT(*) FROM jos_findme_style s WHERE s.user_id = c.user_id) as sCount,
FROM jos_findme c)
关于mysql - 带有子查询的两个表的总和，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/21378383/