更新时间:2022-12-09 16:32:31
你可以这样做:
SELECT SUM(CASE WHEN val2=26 THEN 1 ELSE 0 END) AS following_count, SUM(CASE WHEN val3=26 THEN 1 ELSE 0 END) AS follower_count FROM table1
在同一个表上具有不同 where 子句的两个选择查询