In this article, we will discuss the difference between SET QUOTED_IDENTIFIERS ON and SET QUOTED_IDENTIFIERS OFF. Please go through the article SET QUOTED_IDENTIFIER ON/OFF Setting in SQL Server to have detailed information on this setting. It is better practice to use SET QUOTED_IDENTIFIERS ON setting.
| SET QUOTED_IDENTIFIERS ON | SET QUOTED_IDENTIFIERS OFF |
| Characters Enclosed within double quotes | is treated as Identifier | is treated as Literal |
| Try using Characters Enclosed within double quotes as identifier | Works
Example: Below statement to create a table with table name “Table” succeeds.
SET QUOTED_IDENTIFIER ON GO
CREATE TABLE dbo."Table"
(id int,"Function" VARCHAR(20)) GO
| Fails
Example: Below statement to create a table with table name “Table” Fails.
SET QUOTED_IDENTIFIER OFF _
GO
CREATE TABLE dbo."Table"
(id int,"Function" _
VARCHAR(20)) GO
Error Message:
Msg 102, Level 15, State 1,
Line 1 Incorrect syntax
near ‘Table’. |
| Try using Characters Enclosed within double quotes as Literal. | Fails
Example: Below statement fails.
SET QUOTED_IDENTIFIER ON
GO
SELECT "BIRADAR"
Error Message:
Msg 207, Level 16, State 1,
Line 1 Invalid column name ‘BIRADAR’. | Works
Example: Below Statement Works.
SET QUOTED_IDENTIFIER OFF
GO
SELECT "BIRADAR"
|
| Characters Enclosed within single quotes | is treated as Literal
Example:
SET QUOTED_IDENTIFIER ON
GO
SELECT ‘BIRADAR’
| is treated as Literal
Example:
SET QUOTED_IDENTIFIER ON
GO
SELECT ‘BIRADAR’
|
How to find all the objects which are created with SET QUTOED_IDENTIFIERS ON/OFF | Below Statement can be used to find all the objects created with
SET QUTOED_IDENTIFIERS setting
as ON:SELECT OBJECT_NAME _
(object_id) _
FROM sys.sql_modules _
WHERE uses_quoted_identifier = 1
| Below Statement can be used to find all the objects created
with SET QUTOED_IDENTIFIERS_
setting as OFF:_
SELECT OBJECT_NAME _
(object_id) _
FROM sys.sql_modules _
WHERE _
uses_quoted_identifier = 0
|
Visit my blog SqlHints for many more such SQL Server Tips/Tricks.
Please correct me if my understanding is wrong. Comments are always welcome.
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