MySQL - CONCAT Function


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MySQL CONCAT function is used to concatenate two strings to form a single string. Try out the following example −

mysql> SELECT CONCAT('FIRST ', 'SECOND');
+----------------------------+
| CONCAT('FIRST ', 'SECOND') |
+----------------------------+
|        FIRST SECOND        |
+----------------------------+
1 row in set (0.00 sec)

To understand CONCAT function in more detail, consider an employee_tbl table, which is having the following records −

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)

Now, suppose based on the above table you want to concatenate all the names employee ID and work_date, then you can do it using the following command −

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)

mysql-useful-functions.htm

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