what is the difference between varchar(50),varchar(MAX),nvarchar(100),varbinary(100)?

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hi,

Can anyone know this.

what is the difference between varchar(50),varchar(MAX),nvarchar(100),varbinary(100)?

Posted 22-Feb-12 0:03am

sathiyak

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_Maxxx_ · Answer 1 · 2012-02-22T00:19:00

Varchar is not Unicode
Nvarchar is Unicode
(size) defines the maximum length of the filled
(max) defines thisnlengthnto be the maximum allowable for that type (about 8000 chars for varchar)
Varbinary holds binary data rather than ASCII or Unicode.

The 'var' bit is an indication that the actual space taken up for the fild is variable I.e. if you store "abc" in a varchar(100) it doesn't take up 100 bytes of storage , rather it takes a little over three.

Mehdi Gholam · Answer 2 · 2012-02-22T00:19:00

Solution 2

varchar is collation sensitive character string (1 byte per character) nvarchar is a unicode string (2 bytes per character)

The number in the parenthesis is the size of the string.

MAX is a new keyword (post sql 2005) which is a variable length of unlimited size string.

Posted 22-Feb-12 0:19am

Mehdi Gholam

Sarvesh Kumar Gupta · Answer 3 · 2012-02-22T00:47:00

Solution 3

Hi,

Varchar is not Unicode and takes 1 byte per char
Nvarchar is Unicode and takes 2 byte par char

Max takes maximum size, it can have.

VarBinary stores value in bit format (0 or 1), it is mainly used for security.

Posted 22-Feb-12 0:47am

Sarvesh Kumar Gupta