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AND (Transact-SQL)

Combines two Boolean expressions and returns TRUE when both expressions are TRUE. When more than one logical operator is used in a statement, the AND operators are evaluated first. You can change the order of evaluation by using parentheses.

Topic link icon Transact-SQL Syntax Conventions


boolean_expression AND boolean_expression

boolean_expression

Is any valid expression that returns a Boolean value: TRUE, FALSE, or UNKNOWN.

Returns TRUE when both expressions are TRUE.

The following chart shows the outcomes when you compare TRUE and FALSE values by using the AND operator.

 

TRUE

FALSE

UNKNOWN

TRUE

TRUE

FALSE

UNKNOWN

FALSE

FALSE

FALSE

FALSE

UNKNOWN

UNKNOWN

FALSE

UNKNOWN

A. Using the AND operator

The following example selects information about employees who have both the title of Marketing Assistant and more than 41 vacation hours available.

USE AdventureWorks2008R2;
GO
SELECT  BusinessEntityID, LoginID, JobTitle, VacationHours 
FROM HumanResources.Employee
WHERE JobTitle = 'Marketing Assistant'
AND VacationHours > 41 ;

B. Using the AND operator in an IF statement

The following examples show how to use AND in an IF statement. In the first statement, both 1 = 1 and 2 = 2 are true; therefore, the result is true. In the second example, the argument 2 = 17 is false; therefore, the result is false.

IF 1 = 1 AND 2 = 2
BEGIN
   PRINT 'First Example is TRUE'
END
ELSE PRINT 'First Example is FALSE';
GO

IF 1 = 1 AND 2 = 17
BEGIN
   PRINT 'Second Example is TRUE'
END
ELSE PRINT 'Second Example is FALSE' ;
GO
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