Tutorial _ MySQL

This article describes how to use the max () function in MySQL. it is the basic knowledge for getting started with MySQL. For more information, see max () in MySQL () the function is used to find the maximum value record in a record set.

The EMPLOYEE_TBL table considering the MAX function has 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, assume that you want to obtain the maximum value of daily_typing_pages in the table, simply use the following command:

mysql> SELECT MAX(daily_typing_pages)  -> FROM employee_tbl;+-------------------------+| MAX(daily_typing_pages) |+-------------------------+|           350 |+-------------------------+1 row in set (0.00 sec)

All records can be found. The maximum value is that each record uses the group by clause as follows:

mysql> SELECT id, name, work_date, MAX(daily_typing_pages)  -> FROM employee_tbl GROUP BY name;+------+------+------------+-------------------------+| id  | name | work_date | MAX(daily_typing_pages) |+------+------+------------+-------------------------+|  3 | Jack | 2007-05-06 |           170 ||  4 | Jill | 2007-04-06 |           220 ||  1 | John | 2007-01-24 |           250 ||  2 | Ram | 2007-05-27 |           220 ||  5 | Zara | 2007-06-06 |           350 |+------+------+------------+-------------------------+5 rows in set (0.00 sec)

You can also use the MIN function and MAX function to find the minimum value. try the following example:

mysql> SELECT MIN(daily_typing_pages) least, MAX(daily_typing_pages) max  -> FROM employee_tbl;+-------+------+| least | max |+-------+------+|  100 | 350 |+-------+------+1 row in set (0.01 sec)