使用MySQL CONCAT()函数将两个字符串连接起来，形成一个单一的字符串。试试下面的例子：
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mysql> SELECT CONCAT('FIRST ', 'SECOND');+----------------------------+| CONCAT('FIRST ', 'SECOND') |+----------------------------+| FIRST SECOND |+----------------------------+1 row in set (0.00 sec) |
了解CONCAT函数更详细，考虑EMPLOYEE_TBL表具有以下记录：
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mysql> SELECT * FROM employee_tbl;+------+------+------------+--------------------+| id | name | work_date | daily_typing_pages |+------+------+------------+--------------------+| 1 | John | 2007-01-24 | 250 || 2 | Ram | 2007-05-27 | 220 || 3 | Jack | 2007-05-06 | 170 || 3 | Jack | 2007-04-06 | 100 || 4 | Jill | 2007-04-06 | 220 || 5 | Zara | 2007-06-06 | 300 || 5 | Zara | 2007-02-06 | 350 |+------+------+------------+--------------------+7 rows in set (0.00 sec) |
可以用以下命令连结上表中的name和ID：
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mysql> SELECT CONCAT(id, name, work_date) -> FROM employee_tbl;+-----------------------------+| CONCAT(id, name, work_date) |+-----------------------------+| 1John2007-01-24 || 2Ram2007-05-27 || 3Jack2007-05-06 || 3Jack2007-04-06 || 4Jill2007-04-06 || 5Zara2007-06-06 || 5Zara2007-02-06 |+-----------------------------+7 rows in set (0.00 sec) |
