What is menat by N beside the name in this SQL quary

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SQL

declare @Departement_Name varchar(100)
execute SP_GETDepartementByName <big>N'mike'</big>,
@Departement = @Departement_Name output
select @Departement_Name

what are the diffrence between adding it and removing it

What I have tried:

just removing it

SQL

<pre>declare @Departement_Name varchar(100)
execute SP_GETDepartementByName <big>N'mike'</big>,
@Departement = @Departement_Name output
select @Departement_Name

Posted 29-Aug-19 1:53am

Member 14479161

Updated 29-Aug-19 1:58am

v2

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jimmson · Accepted Answer · 2019-08-29T01:56:00

Solution 1

It's declaring the string as nvarchar data type, rather than varchar.
Source: sql server - What is the meaning of the prefix N in T-SQL statements? - Stack Overflow[^]

Posted 29-Aug-19 1:56am

jimmson

Comments

Maciej Los 29-Aug-19 7:59am

5ed!

#realJSOP · Accepted Answer · 2019-08-29T01:56:00

Solution 2

It means the value is a unicode string.

Posted 29-Aug-19 1:56am

#realJSOP

Updated 29-Aug-19 1:58am

v2

Comments

Maciej Los 29-Aug-19 7:59am

5ed!

Maciej Los · Accepted Answer · 2019-08-29T01:57:00

Solution 3

N is a prefix. It identifies/declares NVARCHAR data type instead of VARCHAR. N prefix tells sql server to treat the string as a unicode value

For further details, please see:
nchar and nvarchar (Transact-SQL) - SQL Server | Microsoft Docs[^]
char and varchar (Transact-SQL) - SQL Server | Microsoft Docs[^]

Posted 29-Aug-19 1:57am

Maciej Los

Updated 29-Aug-19 1:59am

v2

Comments

jimmson 29-Aug-19 8:00am

5!

Maciej Los 29-Aug-19 8:05am

Thank you.

OriginalGriff · Accepted Answer · 2019-08-29T01:58:00

Solution 4

N'a string' means that 'a string' is Unicode, and should be stored in an NVARCHAR column, rather than a VARCHAR. Without the N, it reverts to the older, smaller ASCII VARCHAR.

In general, despite needing more space you should be using NVARCHAR to match modern applications and frameworks such as .NET

Posted 29-Aug-19 1:58am

OriginalGriff

Comments

Maciej Los 29-Aug-19 7:59am

5ed!