os : linux

数据库: musql 8.0.25

今天工作中遇到了如何查询单个分区中数据的问题，记录下以便于后续再次遇到此问题就可以直接查询该文章了。

建表语句和插入数据的SQL语句如下：

drop table if exists tt;create table tt (c1 int primary key, c2 varchar(50))engine=xxx partition by hash(c1) partitions 2 (partition p1, partition p2);insert into tt values(1,'aa'), (2,'bb'), (3, 'cc'), (4, 'dd'), (5, 'ee');

其他的建表语句可以参考：MySQL中创建partition表的几种方式_一缕阳光a的博客-CSDN博客

查询单个partition中的数据的SQL如下：

mysql[test]> select * from tt;
+----+------+
| c1 | c2   |
+----+------+
|  2 | bb   |
|  4 | dd   |
|  1 | aa   |
|  3 | cc   |
|  5 | ee   |
+----+------+
5 rows in set (0.01 sec)mysql[test]> select * from tt partition (p1);
+----+------+
| c1 | c2   |
+----+------+
|  2 | bb   |
|  4 | dd   |
+----+------+
2 rows in set (0.01 sec)mysql[test]> select * from tt partition (p2);
+----+------+
| c1 | c2   |
+----+------+
|  1 | aa   |
|  3 | cc   |
|  5 | ee   |
+----+------+
3 rows in set (0.01 sec)