Or Operator – SQL Server Syntax Example: Or Operator – T-SQL Example

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Or Operator – SQL Server Syntax Example: Or Operator – T-SQL Example

Purpose: – Illustrates the SQL Server syntax for OR operator.

SYNTAX:

SELECT [ ALL | DISTINCT ]
[TOP ( expression ) [PERCENT] [ WITH TIES ] ]
column_list
[ INTO new_table ]
[ FROM { table_source } [ ,...n ] ]
[ WHERE expression1 OR expression2
[ GROUP BY ]
[ HAVING search_condition ]
[ ORDER BY order_expression [ ASC | DESC ]

PURPOSE:
Returns true or false as the result of combining two expressions.

NOTE: When AND and OR are used in a condition,AND takes precedence over OR.

 

Code Sample for OR operator:

 T-SQL | 
 copy code |
?
 
 
/* Or example from http://idealprogrammer.com 
 
 PURPOSE: Returns true or false as the result of combining two expressions
 
 SYNTAX: expression1 OR expression2
 
 
 NOTE: When AND and OR are used in a condition,AND takes precedence over OR.
 
 SELECT [ ALL | DISTINCT ] 
			[TOP ( expression ) [PERCENT] [ WITH TIES ] ] 
			 column_list  
			[ INTO new_table ] 
			[ FROM { table_source } [ ,...n ] ] 
			[ WHERE expression1 OR expression2] 
			[ GROUP BY ] 
			[ HAVING  search_condition  ] 
			[ ORDER BY  order_expression [ ASC | DESC ] ] 
*/
 
 
CREATE TABLE people(
     ID          int,
     firstname   varchar (20),
     lastname    varchar (20),
     statecode   varchar (2),
     alive       bit,
     height      int )
 GO
 
 
 
 
 INSERT INTO people (ID, firstname, lastname, statecode, alive) --height is null 
 VALUES (1,  'Paul', 'Revere', 'AL', 0)
 GO
 
 INSERT INTO people (ID, firstname, lastname, statecode, alive, height) 
 VALUES (2,  'Pat', 'Lennon', 'NY', 0, 69)
 GO
 
 INSERT INTO people (ID, firstname, lastname, statecode, alive, height)
 VALUES (3,  'Peter', 'Martin', 'NY', 1, 75)
 GO
 
 INSERT INTO people (ID, firstname, lastname, statecode, alive, height)
 VALUES (4,  'George', 'Washington', 'VA', 0, 75)
 GO
 
 
 
 -- Select entire table
 SELECT 'Entire Table', * FROM people
 
 -- 1. Example of using OR with parentheses
 
 SELECT 'Example #1' as Example, firstname, lastname, height 
  FROM people p
  WHERE (firstname = 'Paul' and lastname = 'Revere')
  OR (firstname = 'George' and lastname = 'Washington')
 
 GO
 
 -- 2. Example of OR in simple query
 
DECLARE @bit bit   
SET @bit = 1 
 
SELECT 'Example #2' AS Example, @bit As bit
WHERE @bit = 0 OR @bit = 1
 
 
 
 
 DROP TABLE people;
 
 GO
 
 
 
 

Sample Output for OR operator Example

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