variant_sub - Subtracts the value of the right variant from the left variant value
- left - The left operand.
- right - The right operand.
Subtracts right from left.
Variant Subtraction Rules If Then Both expressions are of the string type Subtraction One expression is a string type and the other a character Subtraction One expression is numeric and the other is a string Subtraction. Both expressions are numeric Subtraction Either expression is NULL NULL is returned Both expressions are empty Empty string is returned