In this post, I am sharing a small note on QUOTED_IDENTIFIER and ANSI_NULL of SQL Server.
This is very basic and most popular topic for all SQL Server Professionals.

You can find an N number of article and discussion on this subject. But I always like writing about the popular topic in my words.

QUOTED_IDENTIFIER ON/OFF:

SET QUOTED_IDENTIFIER ON
GO
SET QUOTED_IDENTIFIER OFF
GO

This option is ON and characters enclosed within double quotes then is treated as an Identifier.
This option is OFF and characters enclosed within double quotes then is treated as a Literal.
Using this option you can use SQL Server reserved words as an Identifiers.

For example:

SET QUOTED_IDENTIFIER ON GO
CREATE TABLE dbo.”Table”
(id int,”View” VARCHAR(255)) GO

ANSI_NULL ON/OFF:

SET ANSI_NULLS ON
GO
SET ANSI_NULLS OFF
GO

This option basically for ANSI NULL comparisons. If this option ON and you compare your query value with a NULL, the result is 0.
If this option OFF and you compare your query value with a NULL, then the result is NULL.

In a future version of SQL Server, ANSI_NULLS will always be ON, and any applications that explicitly set the option to OFF will generate an error.