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Need of using BeginTrans and CommitTrans

Posted on 2000-04-02
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Last Modified: 2012-06-27
Hi.... why cannot I executed a SQL statement without enclosing it by BeginTrans and CommitTrans instructions? what do they really do?

Thanks
Skel
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Question by:skel
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2 Comments
 

Expert Comment

by:chsoh
ID: 2678774
The main purpose of transaction is make data isolation so that multiple users can access data simultaneously without interfering with one another.

When you execute a SQL begin with BeginTrans, you MUST execute the CommiTrans or RollbackTrans to either make the transaction success or Undo the transaction.

This is becoz when you execute the BeginTrans, all the statements & instruction under BeginTrans will be keeped & recorded before it actually done on database. The statements between BeginTrans and CommitTrans will be actually done after the CommitTrans statement, or cancelled if RollbackTrans.

anythings need to know ?
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Accepted Solution

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srikant033100 earned 150 total points
ID: 2679431
Hi
Skel
You actually need a begin Trans to tell to the RDBMS that it is actuall starting a new transaction and it is very important to maintain the consistencies of data. Untill u start with a begin trans or end with an commit or rollback it is very difficult to maintain the database at a consistent and accurte level. That is why every transaction or else a set or action which together we call as transaction has to start with a begin trans and end with end trans or rollback with rollback.

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