Syntax
MIN([DISTINCT | ALL] expr)
Purpose
MIN() returns the minimum value in the specified data set.
The argument of MIN() can be a string, in which case the minimum string value is returned. The DISTINCT keyword specifies to evaluate only distinct values. By default, ALL is used.
Examples
Assume that the table a has the following three data rows: id=1,num=10, id=2,num=20, and id=3,num=30, you can execute the following statement to obtain the minimum num:
obclient> SELECT MIN(num) FROM a;
+----------------+
| MIN(num) |
+----------------+
| 10 |
+----------------+
1 row in set
