mysql - 如何构造此查询

Question

我有以下 2 个查询:

SELECT CARD_ID,COUNT(CARD_ID) AS CNT1 FROM G_CARD_SCHEDULE GROUP BY CARD_ID

谁的输出是

CARD_ID     CNT1
119         1
120         2

SELECT CARD_ID,COUNT(CARD_ID) AS CNT2 FROM G_SENT_TABLE GROUP BY CARD_ID

谁的输出是

CARD_ID     CNT2
115         2
120         1

现在我的查询应该使用这两个输出

CARD_ID     CNT2
120         3
115         2
119         1

所以基本上我必须通过排序的 ID 得到它们的总和。我该怎么做？

Answer 1

select card_id,count(card_id) as cnt2 from (
SELECT CARD_ID FROM G_CARD_SCHEDULE 
union all
SELECT CARD_ID FROM G_SENT_TABLE) as t
group by card_id
order by cnt2 desc