Was this page helpful?
Your feedback about this content is important. Let us know what you think.
Additional feedback?
1500 characters remaining
OR (Transact-SQL)

OR (Transact-SQL)

 

Applies To: SQL Server 2014, SQL Server 2016 Preview

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.

Applies to: SQL Server (SQL Server 2008 through current version), Azure SQL Database, Azure SQL Data Warehouse Public Preview.

Topic link icon Transact-SQL Syntax Conventions

boolean_expression OR boolean_expression

boolean_expression

Is any valid expression that returns TRUE, FALSE, or UNKNOWN.

OR returns TRUE when either of the conditions is TRUE.

The following table shows the result of the OR operator.

 

TRUE

FALSE

UNKNOWN

TRUE

TRUE

TRUE

TRUE

FALSE

TRUE

FALSE

UNKNOWN

UNKNOWN

TRUE

UNKNOWN

UNKNOWN

The following example uses the vEmployeeDepartmentHistory view to retrieve the names of Quality Assurance personnel who work either the evening shift or the night shift. If the parentheses are omitted, the query returns Quality Assurance employees who work the evening shift and all employees who work the night shift.

USE AdventureWorks2012;
GO
SELECT FirstName, LastName, Shift 
FROM HumanResources.vEmployeeDepartmentHistory
WHERE Department = 'Quality Assurance'
   AND (Shift = 'Evening' OR Shift = 'Night');

Here is the result set.

FirstName LastName Shift

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

Andreas Berglund Evening

Sootha Charncherngkha Night

Community Additions

ADD
Show:
© 2015 Microsoft