HomeProgramSQL Server

DATALENGTH function in SQL Server

The article will explore and show you how to use the DATALENGTH function in SQL Server to display the number of bytes used to represent an expression .

Describe

The DATALENGTH function in SQL Server returns the length of an expression, in bytes.

Syntax

To use the DATALENGTH function in SQL Server, we use the following syntax:

 DATALENGTH(bieu_thuc)

Parameters :

  1. bieu_thuc: data you want to display the length in bytes. If the expression is NULL, DATALENGTH returns NULL

Note :

  1. The DATALENGTH function calculates both the preceding and the following spaces when calculating the length of an expression.
  2. The DATALENGTH function will return NULL if the expression is NULL.
  3. See also the LEN function to calculate the length of the string but does not include spaces.
  4. DATALENGTH function can be used in later versions of SQL Server: SQL Server 2017, SQL Server 2016, SQL Server 2014, SQL Server 2012, SQL Server 2008 R2, SQL Server 2008, and SQL Server 2005.

For example

Take a look and explore some examples of DATALENGTH functions in SQL Server.

 SELECT DATALENGTH('TipsMake.com'); 
 Result: 15 
 
 SELECT DATALENGTH(' TipsMake.com '); 
 Result: 17 
 
 SELECT DATALENGTH(1234); 
 Result: 4 
 
 SELECT DATALENGTH('20-02-2019'); 
 Result: 10 
 
 SELECT DATALENGTH(' '); 
 Result: 1 
 
 SELECT DATALENGTH(''); 
 Result: 0 
 
 SELECT DATALENGTH(NULL); 
 Result: NULL

Previous article: Operator '+' in SQL Server

Next lesson: LEFT function in SQL Server

4 ★ | 1 Vote
mssql

You should read it

May be interested

  • CEILING function in SQL ServerCEILING function in SQL Server
    the ceiling function in sql server returns the smallest integer value greater than or equal to the transmitted numeric expression.
  • RIGHT function in SQL ServerRIGHT function in SQL Server
    the article will explore and guide you how to use the right function in sql server to extract some characters from the right side of a given string.
  • FLOOR function in SQL ServerFLOOR function in SQL Server
    the floor function in sql server returns the largest integer value but less than or equal to the transmitted numeric expression.
  • MONTH function in SQL ServerMONTH function in SQL Server
    this article will show you in detail how to use the datetime month () processing function in sql server with specific syntax and examples to better visualize and capture functions.
  • DATEDIFF function in SQL ServerDATEDIFF function in SQL Server
    this article will show you in detail how to use sql server's datetime datediff () function with syntax and specific examples to make it easier to visualize and capture functions.
  • GETUTCDATE function in SQL ServerGETUTCDATE function in SQL Server
    this article will show you in detail how to use datetime getutcdate () function in sql server with specific syntax and examples to better visualize and capture functions.
  • SQL Server YEAR functionSQL Server YEAR function
    sql server's year function returns a 4-digit integer that is the year value in the timestamp passed.
  • NULLIF function in SQL ServerNULLIF function in SQL Server
    this article will show you in detail how to use the nullif function handler in sql server with specific syntax and examples to better visualize and capture functions.
  • COUNT function in SQL ServerCOUNT function in SQL Server
    this article will show you in detail how to use functions that handle count () numbers in sql server with specific syntax and examples to better visualize and capture functions.
  • LEN function in SQL ServerLEN function in SQL Server
    the len function in sql server returns the length of the specified string. it is important that the len function does not include whitespace characters at the end of the string when calculating length.

SQL Server