You can use the NOT logical operator in combination with any SAS and WHERE expression operator. And you can combine the NOT operator with AND and OR. For example: where skill not eq 'cobol' or years ...

Boolean operators, which Excel calls logical functions, include AND, OR, NOT, and a new function called XOR. These operators are used between search terms to narrow, expand, ...

The AND logical operator (&) compares two matrices, element by element, to produce a new matrix. An element of the new matrix is 1 if the corresponding elements of matrix1 and matrix2 are both nonzero ...

Logical patterns enable you to use the logical operators and, or, and not. Note that you can use logical patterns and relational patterns independently or in combination.