The Min function of MySQL is used to find a record of the minimum value of a recordset.
To understand the Employee_tbl table that the Min function considers has the following records:
Mysql> SELECT * from EMPLOYEE_TBL;
+------+------+------------+--------------------+
| id | name | work_date | daily_typing_pages
| +------+------+------------+--------------------+
| 1 | John | 2007-01-24 | The |
| 2 | Ram | 2007-05-27 | The |
| 3 | Jack | 2007-05-06 | 170 |
| 3 | Jack | 2007-04-06 | |
| 4 | Jill | 2007-04-06 | The |
| 5 | Zara | 2007-06-06 | A |
| 5 | Zara | 2007-02-06 | |
+------+------+------------+--------------------+
7 rows in Set (0.00 sec)
Now assume that the above table is based on the minimum value you want to take daily_typing_pages, so you can do this by simply using the following command:
Mysql> SELECT MIN (daily_typing_pages)
-> from Employee_tbl;
+-------------------------+
| MIN (daily_typing_pages) |
+-------------------------+
| |
+-------------------------+
1 row in Set (0.00 sec)
You can find the minimum values for all records by using the group by name as follows:
Mysql> ID, name, work_date, MIN (daily_typing_pages)
-> from Employee_tbl GROUP by name;
+------+------+------------+-------------------------+
| id | name | work_date | MIN (daily_typing_pages) |
+------+------+------------+-------------------------+
| 3 | Jack | 2007-05-06 | |
| 4 | Jill | 2007-04-06 | The |
| 1 | John | 2007-01-24 | The |
| 2 | Ram | 2007-05-27 | The |
| 5 | Zara | 2007-06-06 | |
+------+------+------------+-------------------------+
5 rows in Set (0.00 sec)
You can use the Min function with the 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 | |
+-------+------+
1 row in Set (0.01 sec)