情况是这样的：
表一（短信）
id | t_id | sms_text 1 | 200 | some text here ... 2 | 201 | some text here ... 3 | 202 | some text here ... 4 | 201 | some text here ... 5 | 202 | some text here ... 6 | 202 | some text here ...
表二（msg）
id | t_id | msg_text 1 | 201 | some text here ... 2 | 202 | some text here ... 3 | 200 | some text here ... 4 | 200 | some text here ... 5 | 202 | some text here ... 6 | 200 | some text here ...
现在我想要类似的结果
计算结果（短信+信息）
t_id | count result 200 | 4 201 | 3 202 | 5
有可能吗？如果是，怎么样？
答案 0 :(得分：2)
您可以 - 例如 - 使用UNION ALL从两个表中获取t_id，只需COUNT个;
SELECT t_id, COUNT(*) `count`
FROM (
SELECT t_id FROM Table1
UNION ALL
SELECT t_id FROM Table2
) dummy
GROUP BY t_id