Logical Operators (Transact-SQL)
Logical operators test for the truth of some condition. Logical operators, like comparison operators, return a Boolean data type with a value of TRUE, FALSE, or UNKNOWN.
TRUE if all of a set of comparisons are TRUE.
TRUE if both Boolean expressions are TRUE.
TRUE if any one of a set of comparisons are TRUE.
TRUE if the operand is within a range.
TRUE if a subquery contains any rows.
TRUE if the operand is equal to one of a list of expressions.
TRUE if the operand matches a pattern.
Reverses the value of any other Boolean operator.
TRUE if either Boolean expression is TRUE.
TRUE if some of a set of comparisons are TRUE.