OR (T-SQL)

Combines two conditions. When more than one logical operator is used in a statement, OR operators are evaluated after AND operators. However, you can change the order of evaluation by using parentheses.

Syntax

boolean_expression OR boolean_expression

Arguments

boolean_expression

Is any valid Microsoft® SQL Server™ expression that returns TRUE, FALSE, or UNKNOWN.

Result Types

Boolean

Result Value

OR returns TRUE when either of the conditions is TRUE.

Remarks

The table shows the result of the OR operator.

Examples

This example retrieves the book titles that carry an advance greater than $5,500 and that are either business or psychology books. If the parentheses are not included, the WHERE clause retrieves all business books or psychology books that have an advance greater than $5,500.

USE pubs

GO

SELECT SUBSTRING(title, 1, 30) AS Title, type

FROM titles

WHERE (type = 'business' OR type = 'psychology') AND
    advance > $5500

ORDER BY title

GO

Here is the result set:

Title                          type        

------------------------------ ------------

Computer Phobic AND Non-Phobic psychology  

Life Without Fear              psychology  

You Can Combat Computer Stress business    

(3 row(s) affected)

See Also