Difference Between drop and truncate in sql

Syedshakeer
Posted by in Sql Server category on for Beginner level | Views : 5483 red flag

DROP and TRUNCATE
DROP and TRUNCATE

Drop:

 

 When you drop the Table:

1)    All data and structure in the table is deleted

2)    Any Pending transaction are commited

3)    All Indexes are dropped

4)    You cannot RollBack the DROP Table statement.

5)DROP TABLE is commited automatically

6)Indexes, tables, and databases can easily be deleted/removed with the   DROP statement

 

Syntax:

DROP INDEX Syntax for MS SQL Server:

DROP INDEX table_name.index_name

 

The DROP TABLE Statement:

The DROP TABLE statement is used to delete a table

       DROP TABLE dept;

        Table Dropped   

The DROP DATABASE Statement:

The DROP DATABASE statement is used to delete a database.

DROP DATABASE database_name

 

 

Truncate:

 

  When you Truncate a Table

1)    Removes all Rows from a Table

2)    Releses the storage space used by that table

3)    You cannot roll back row removal when using TRUNCATE.

4)    If the table is Parent of a refrential integrity constraint,you cannot truncate the TABLE.Disable the constraint before issuing the TRUNCATE statement.

Syntax:

   

 TRUNCATE TABLE tablename;

 

         tablename is the name of the table.



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Syedshakeer
Full Name: Syed Shakeer Hussiain P
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Member Since: 2/5/2009 3:12:18 AM
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Syed Shakeer Hussain
http://www.dotnetfunda.com
Shakeer Hussain has completed his Master of Computer Applications degree from Deccan College of engg and technology of Osmania University.He is a MVM of www.dotnetspider.com.He has good experience in the areas of ASP.NET, C#.NET, VB.NET, SQL SERVER 2000/2005 and Windows Mobile. He has worked in Windows Mobile,Web Applicatin and ERP projects.

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Comments or Responses

Posted by: Vuyiswamb on: 5/12/2009
This might be small, but is Vauable information.

Thanks for sharing

Vuyiswa Maseko

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