rollback tran

-- Select, update, and delete locks to be applied for to handle deadlock congestion problems (two update operations) For the update statement, you can simply query the SQL Server first and find the data to be modified. Then, modify the record. The

SQL server lock mechanism (I)-Overview (lock types and ranges) SQL SERVER lock mechanism (II)-Overview (Lock compatibility and lockable resources)   This article introduces the locking mechanism of SQL SERVER (iii) -- Overview (lock and transaction

Insert the field values separated by a single character into the table cyclically Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/-->Declare @ strchatrooms nvarchar (1000) -- custom parameter, value

References: Basic knowledge of Database Transaction ManagementSqlserver Lock MechanismUnderstanding locking in SQL ServerIn-depth analysis of SQL server2008-transaction and concurrency Two concurrency Models Pessimistic concurrency The database

A transaction is a unit of concurrency control and a sequence of user-defined operations. These operations are either done or not done. They are an inseparable unit of work.Through transactions, SQL Server can bind a set of logical operations to

If exists (select * From DBO. sysobjects where id = object_id (n' [DBO]. [sp_decrypt] ') and objectproperty (ID, n' isprocedure') = 1) Drop procedure [DBO]. [sp_decrypt] Go /* -- Crack functions, processes, triggers, and views. Limited to sqlserver2

1. Polymorphism Here we will summarize the functions of virtual override and new. There are three classes A, B, C, B, and C inherited from a, some of which are overwritten, and some are overwritten: Public   Class A { Public A ()

This article describes how to handle the problem. net locks six methods. First, let's discuss the concurrency problem, and then discuss the three methods to deal with optimistic locks. Optimistic locks cannot solve the concurrency problem from the

  Alter procedure awf_insertzjdata@ Zjid varchar (11 ),@ Fabh varchar (15 ),@ Zhymch varchar (8 ),@ Zjnr textAs Declare @ error integerBegin Tran mytranSet @ error = 0 Delete zjdataWhere zjid = @ zjid and fabh = @ fabh and zhymch = @ zhymchSet @

Problem The values of the date fields in several tables are both date and time. For example, at on June 18, April 22, 2013, the contents of these tables on each day should be summarized into a record and inserted into the new table. Solution 1.

Today, Mr. Yuan Longyou continued to talk about databases. I didn't attend lectures. Below is a training diary recorded by Zhang Ting.  Stored ProcedureStored procedures are a combination of some code. Similar to Java methods, developers generally

1. Regarding the concurrency issue, that is, if I am browsing, and another user is modifying. An error occurs.SET transaction read onlySelect * from MERs where name = 'tree ';Commit;2. p227 transactions and rollback.Same life and death ..The

Transactions and locks in SQL Server   Transactions are all about atomicity. The concept of atomicity refers to the ability to treat things as a unit. From the database perspective, it refers to the minimum combination of one or more statements that

SQL Server trigger and SQL Server triggerA trigger is a special type of stored procedure, which is different from the stored procedure we introduced earlier. A trigger is triggered by an event and automatically called for execution. The stored

Start: -------------------------------------------------------------------------------- On the network, we can see how SQL Server 2000 and SQL Server 2005 encrypt and decrypt stored procedures. Later, we analyzed the code and found that they work in

For details about the configuration of the COM + environment, see the excerptArticleDistributed transactions (1) --- MTS settings Http://blog.csdn.net/honkerhero/archive/2007/03/28/1544072.aspx For troubleshooting of running problems, see file

Use [limo_db] Go/****** object: storedprocedure [DBO]. [sp_biz_approve_import] script Date: 09/06/2014 17:59:52 ******/set ansi_nulls ongoset quoted_identifier ongoalter proc [DBO]. [updated] @ ID int, @ isimmediate bit, @ approvedby int, @ outmsg

Tag: Value copy disk -- action prediction specified job Deletion Trigger: A trigger is a special type of stored procedure that automatically takes effect when a language event is executed. SQL Server includes three common types of triggers: DML

During Normal project development, I believe that a large batch of people are using this database's auto-incremental ID, which has both advantages and disadvantages. Advantage: saves time and does not need to consider how to identify unique

A transaction is a unit of concurrency control and a sequence of user-defined operations. These operations are either done or not done. They are an inseparable unit of work. Through transactions, SQL Server can bind a set of logical operations to