将限制传递给＆＃34; in＆＃34;在mysql中查询

Question

我的表格如下：

现在我想通过特定voices_id的限制。

我的意思是，如果我只需要3个特定voices_id的记录，那么该怎么做？ （voices_id = 153＆amp; 154的3条记录）通过限制的地方？

Answer 1

这是你可以做的

select *
from table_name t1
where t1.voices_id in (153,154)
and
(
   select count(*) from table_name t2
   where t1.voices_id = t2.voices_id and t1.id <= t2.id
) <= 3
order by t1.voices_id
;

此处条件t1.id <= t2.id将为您提供每组最后3个条目，您可以在前3个条目中将其反转。

Answer 2

就这么简单：

SELECT * FROM voices_talks WHERE voices_id=153 LIMIT 3
UNION ALL
SELECT * FROM voices_talks WHERE voices_id=154 LIMIT 3