begin tran

SQL Server 2005/2008 provides begin Tran, commit Tran, and rollback Tran to use transactions. Begin Tran indicates that the transaction starts, commit Tran indicates that the transaction is committed, and rollback Tran indicates that the transaction

The specific usage is as follows: Copy Code code as follows: -- ============================================= --Author:cynimoon --Create date:2009-10-09 --Description: sample Stored Procedure -- ======================================

The Begin Tran,commit Tran and rollback TRAN are available in SQL Server 2005/2008 to use transactions.Begin TRAN Indicates the start of a transaction,Commit Tran represents the commit transaction,Rollback TRAN means rolling things backEXEC

1 PrefaceThe database large concurrency operation takes into account the deadlock and lock performance issues. See online most vague (especially update lock), so here is a concise explanation, for the following description of the convenient, here

1 PrefaceThe database large concurrency operation takes into account the deadlock and lock performance issues. See online most vague (especially update lock), so here is a concise explanation, for the following description of the convenient, here

1 PrefaceThe database large concurrency operation takes into account the deadlock and lock performance issues. See online most vague (especially update lock), so here is a concise explanation, for the following description of the convenient, here

1 PrefaceThe database large concurrency operation takes into account the deadlock and lock performance issues. See online most vague (especially update lock), so here is a concise explanation, for the following description of the convenient, here

 Error Handling of nested transactions and transaction retention points     For nested transactions.1. Start external transactions, start internal transactions, and try catchInternal error: if an internal transaction error occurs, internal and

Lock mechanismThe difference between Nolock and Readpast. 1. Open a transaction to perform the Insert data operation. BEGIN TRAN t INSERT into Customer SELECT ' A ', ' a ' 2. Execute a query statement. SELECT * from

1 PrefaceThe database large concurrency operation takes into account the deadlock and lock performance issues. See online most vague (especially update lock), so here is a concise explanation, for the following description of the convenient, here

1 PrefaceThe database large concurrency operation takes into account the deadlock and lock performance issues. See online most vague (especially update lock), so here is a concise explanation, for the following description of the convenient, here

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Directory1. What is the execution plan? The execution plan is dependent on what information.2, unified SQL statement to reduce parsing overhead3. Reduce the nesting of SQL statements4. Staging intermediate results using temporary table5. The OLTP

1ObjectiveThe database large concurrency operation takes into account the deadlock and lock performance issues. See online most vague (especially update lock), so here is a concise explanation, for the following description of the convenient, here

1 PrefaceThe database large concurrency operation takes into account the deadlock and lock performance issues. See online most vague (especially update lock), so here is a concise explanation, for the following description of the convenient, here

This article was reproduced from: http://blog.csdn.net/yuanyuanispeak/article/details/527561671 PrefaceThe database large concurrency operation takes into account the deadlock and lock performance issues. See online most vague (especially update

1, first to understand what is called the implementation plan? An execution plan is a query scheme that the database makes based on the statistics of SQL statements and related tables, which are generated automatically by the query optimizer, such

1, first to understand what is called the implementation plan?An execution plan is a query scheme that the database makes based on the statistics of SQL statements and related tables, which are generated automatically by the query optimizer, such as

1, first to understand what is called the implementation plan?An execution plan is a query scheme that the database makes based on the statistics of SQL statements and related tables, which are generated automatically by the query optimizer, such as

--Blocking/********************************************************************************************************** Blocking: One of the transactions is blocked and other transactions are waiting for the other party to release their locks,