mysql 数据操作 单表查询 concat_ws() 定义显示格式

有个需求用concat以这种格式打印查询

mysql> select concat(name,':',age) from employee;
+----------------------+
| concat(name,':',age) |
+----------------------+
| alex:78              |
| yuanhao:73           |
| liwenzhou:28         |
| jingliyang:18        |
| jinxin:18            |
| 成龙:48              |
| 歪歪:48              |
| 丫丫:38              |
| 丁丁:18              |
| 星星:18              |
| 格格:28              |
| 张野:28              |
| 程咬金:18            |
| 程咬银:18            |
| 程咬铜:18            |
| 程咬铁:18            |
+----------------------+
16 rows in set (0.00 sec)

mysql> select concat(name,':',age,':',sex)from employee;
+------------------------------+
| concat(name,':',age,':',sex) |
+------------------------------+
| alex:78:male                 |
| yuanhao:73:male              |
| liwenzhou:28:male            |
| jingliyang:18:female         |
| jinxin:18:male               |
| 成龙:48:male                 |
| 歪歪:48:female               |
| 丫丫:38:female               |
| 丁丁:18:female               |
| 星星:18:female               |
| 格格:28:female               |
| 张野:28:male                 |
| 程咬金:18:male               |
| 程咬银:18:female             |
| 程咬铜:18:male               |
| 程咬铁:18:female             |
+------------------------------+
16 rows in set (0.00 sec)

mysql中 有个concat_ws 可以简单实现

CONCAT_WS() 第一个参数为分隔符

mysql> select concat_ws(':',name,age,sex) as info from employee;
+----------------------+
| info                 |
+----------------------+
| alex:78:male         |
| yuanhao:73:male      |
| liwenzhou:28:male    |
| jingliyang:18:female |
| jinxin:18:male       |
| 成龙:48:male         |
| 歪歪:48:female       |
| 丫丫:38:female       |
| 丁丁:18:female       |
| 星星:18:female       |
| 格格:28:female       |
| 张野:28:male         |
| 程咬金:18:male       |
| 程咬银:18:female     |
| 程咬铜:18:male       |
| 程咬铁:18:female     |
+----------------------+
16 rows in set (0.00 sec)