concat的使用

可以拼接多个字符

mysql> select concat(name,dept,job) from t1;
+-----------------------+
| concat(name,dept,job) |
+-----------------------+
| jack销售类sale        |
| rose销售类sale        |
| tom技术类DBA          |
| jerry技术类develop    |
| kevin技术类develop    |
+-----------------------+
5 rows in set (0.00 sec)

concat_ws的使用

mysql> select concat_ws('|',name,dept,job) from t1;
+------------------------------+
| concat_ws('|',name,dept,job) |
+------------------------------+
| jack|销售类|sale             |
| rose|销售类|sale             |
| tom|技术类|DBA               |
| jerry|技术类|develop         |
| kevin|技术类|develop         |
+------------------------------+
5 rows in set (0.00 sec)