begin tran and commit tran in sql server

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

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

Turn from: Nested transactions in SQL Server use--transaction count indicates a mismatch between the number of BEGIN and COMMIT statements--The underlying problemProblem:1. System.Data.SqlClient.SqlException (0x80131904): The transaction count after

BEGIN TRANSACTIONMarks the starting point for an explicit local transaction. BEGIN TRANSACTION The @ @TRANCOUNT by 1 increments.BEGIN TRANSACTION represents a point where data referenced by a connection is logically and physically consistent at that

MS SQL Server Query optimization methodThere are many reasons for the slow speed of queries, which are common1, no indexes, or no indexes (this is the most common problem with query slowness, is the flaw in programming)2, I/o throughput is small,

Understanding Transactions and LocksTransactions: The essential tool for maintaining logical data consistency and recoverability.Lock: When multiple users access the same database resource, a mechanism for the priority authority management of access,

NOLOCK (without lock)When this option is selected, SQL Server does not add any locks when reading or modifying data. In this case, it is possible for the user to read the data in the incomplete transaction (uncommited Transaction) or rollback (roll

From: http://blog.csdn.net/missmecn/archive/2008/10/06/3019798.aspx related articles: MySQL database lock Several lock modes in Oracle Recommendation circle:Pipboy More related recommendations The Study of the lock mechanism requires two

Transferred from: http://www.cnblogs.com/knowledgesea/p/3714417.htmlUnderstanding Transactions and LocksTransactions: The essential tool for maintaining logical data consistency and recoverability.Lock: When multiple users access the same database

The transaction is about atomicity. The concept of atomicity means that some things can be viewed as an inseparable unit. From a database point of view, it refers to the smallest combination of one or more statements that should be executed all or