sql server query ntext field length

DATALENGTH

Returns the number of bytes occupied by any expression.

grammar

DATALENGTH ( expression )

parameter

expression

any type of expression.

return type

int

Notes

DATALENGTH is particularly useful for varchar , varbinary , text , image , nvarchar , and ntext data types, because these data types can store variable-length data.

The result of a DATALENGTH of NULL is NULL.

 

Explains that the   compatibility level may affect the return value. For more information on compatibility levels, see sp_dbcmptlevel.

Example

This example finds the length of the pub_namepubs column in the table .

USE pubs
GO
SELECT length = DATALENGTH(pub_name), pub_name
FROM publishers
ORDER BY pub_name
GO

Here is the result set:

length      pub_name                                 
----------- ---------------------------------------- 
20          Algodata Infosystems                     
16          Binnet & Hardley                         
21          Five Lakes Publishing                    
5           GGG&G                                    
18          Lucerne Publishing                       
14          New Moon Books                           
17          Ramona Publishers                        
14          Scootney Books