奈寻味导航网 » 文章资讯 » MySQL查询根据通用匹配ID将每一行中的所有值连接起来

MySQL查询根据通用匹配ID将每一行中的所有值连接起来

2024-04-23 14:51:03 335

让我们首先创建一个表-

mysql> create table DemoTable
(
   StudentId int,
   StudentFirstName varchar(100),
   StudentLastName varchar(100)
);

使用插入命令在表中插入一些记录-

mysql> insert into DemoTable values(1000,'Adam','Smith');
mysql> insert into DemoTable values(1000,'John','Doe');
mysql> insert into DemoTable values(1000,'David','Miller');

使用select语句显示表中的所有记录-

mysql> select *from DemoTable;

这将产生以下输出-

+-----------+------------------+-----------------+
| StudentId | StudentFirstName | StudentLastName |
+-----------+------------------+-----------------+
|      1000 | Adam             | Smith           |
|      1000 | John             | Doe             |
|      1000 | David            | Miller          |
+-----------+------------------+-----------------+
3 rows in set (0.00 sec)

以下是基于公共匹配ID将每行中的所有值连接起来的查询-

mysql> select StudentId,group_concat(StudentFirstName),group_concat(StudentLastName) from DemoTable group by StudentId;

这将产生以下输出-

+-----------+--------------------------------+-------------------------------+
| StudentId | group_concat(StudentFirstName) | group_concat(StudentLastName) |
+-----------+--------------------------------+-------------------------------+
|      1000 | Adam,John,David                | Smith,Doe,Miller              |
+-----------+--------------------------------+-------------------------------+
1 row in set (0.00 sec)

返回顶部
3162201930
czq8825@qq.com

MySQL查询根据通用匹配ID将每一行中的所有值连接起来

热门推荐

随机推荐