The SQL Procedure

BETWEEN condition

Selects rows where column values are within a range of values.

sql-expression <NOT> BETWEEN sql-expression
AND sql-expression

The sql-expressions must be of compatible data types. They must be either all numeric or all character types.
Because a BETWEEN condition evaluates the boundary values as a range, it is not necessary to specify the smaller quantity first.
You can use the NOT logical operator to exclude a range of numbers, for example, to eliminate customer numbers between 1 and 15 (inclusive) so that you can retrieve data on more recently acquired customers.
PROC SQL supports the same comparison operators that the DATA step supports. For example:
```
   x between 1 and 3
   x between 3 and 1
   1<=x<=3
   x>=1 and x<=3
```