來自不同表的MySQL計數

Question

表A

Status
1
1
1
2
2
3

表B

Status
1
1
2
2
2
2
3
3

如何獲得以下結果表

結果表

Status    Count
1           5
2           6
3           3

幫助我構建SQL查詢以在結果表中獲取計數。

Answer 1

Try this

SELECT Status, COUNT(*) FROM
(SELECT a.Status FROM TableA AS a
UNION ALL
SELECT b.Status FROM TableB AS b) UN
GROUP BY Status

Answer 2

SELECT STATUS, COUNT(*) FROM
(SELECT STATUS FROM TABLE1
UNION ALL 
SELECT STATUS FROM TABLE2) un
GROUP BY STATUS

小提琴