rollback tran

A transaction (Transaction) is a unit of concurrency control and is a user-defined sequence of operations. These operations are either done or not, and are an inseparable unit of work.With transactions, SQL Server can bind a logically related set of

Stored Procedure format:CREATE PROCEDUREyourprocedure asBEGIN SETNOCOUNT on; BEGINTRY---------------------Start catching exceptionsBEINTRAN------------------Start a transaction UPDATEASETA.names=B.names fromT1 asAINNER JOINT2 asB

Front of the study initialization of the front-end information is complete, so now start implementing the script part of DB.New Action:Shelf_Init.sqlSvc.sql1 CREATE SCHEMA [svc] 2 AUTHORIZATION [dbo];Shelf_init.sql1 CREATE PROCEDURE [Svc].[Shelf$

Transfer from http://blog.sina.com.cn/s/blog_614b6f210100t80r.htmlI. Create a SQL Server linked service (SQL Server link Oracle) First SQL Server link Oracle can have two access interfaces:"Msdaora" and "OraOLEDB.Oracle"1. The "MSDAORA" Access

database transaction processing in SQL Server is an important concept, but also a little bit difficult to understand, many SQL beginners write transaction processing code is often a vulnerability, this article describes three different methods,

DBHELP statementsusingSystem;usingSystem.Collections.Generic;usingSystem.Linq;usingSystem.Text;usingSystem.Data;usingSystem.Data.SqlClient;namespaceAnalog ATM Transfer {Static classDbhelp { Public Static BOOLIdubysql (stringSQL) { BOOLFA =

　　A: basic knowledge of triggers　　A trigger is a special kind of stored procedure, but without interfaces (input and output parameters), triggers are part of the transaction that raises them because SQL Server automatically throws them as an

Database transactions:A database transaction is a series of operations performed as a single logical unit of work (Transaction) .Transaction processing ensures that data-oriented resources are not permanently updated unless all operations within the

Begin TRAN Tran_money --Start transaction declare @tran_error int; SET @tran_error = 0; BEGIN TRY UPDATE tb_money SET Mymoney = MyMoney-30 WHERE Name = ' Liu Bei '; SET @tran_error = @tran_error + @ @ERROR; --Test the

650) this.width=650; "src="/img/fz.gif "alt=" Copy Code "style=" border:0px; "/>Public static void transaction () {    myitentities entity =  null;    dbtransaction tran = null;    try     {    entity = new myitentities ();     entity .

One, trigger definition and creation:A trigger (trigger) is a special stored procedure whose execution is not invoked by the program or manually, but is triggered by an event, such as when an operation on a table (insert,delete,update) activates it

Memory-Optimized tables are a new feature of SQL Server 2014, which can put tables in memory, which significantly improves DML performance.For memory-optimized tables, refer to the two Heroes article: SQL Server 2014 new features Quest (1)-Memory

First, the window function over the role of two:1, sort order by,row_number, flip page2, zoned area partition by, combined with aggregation function for a part of the data to summarizeSQL Server statements that turn pages:Select from Select as

A. View1. The view is a virtual table, and instead of the actual data, he stores the query statements, but we can do the same thing as the data table.2. Why use a view? My understanding is: 1. When transmitting data remotely, you can avoid long

Introduction to the database transaction isolation levelA transaction (Transaction) is the basic unit of concurrency control. The so-called transaction, which is a sequence of operations that are either executed or not executed, is an inseparable

The first type:BeginTryBeginTranTran1InsertIntoT1 (Id, C1)Values(1,‘1‘)InsertIntoT1 (Id, C1)Values(‘XX2‘,‘2‘)--This sentence produces an errorCOMMITTRANTran1END TryBegin Catchraiserror 50005N' gone wrong ' ROLLBACK TRAN Tran1 ---call rollback after

ALTER proc [dbo]. [Modifywkcashaccountno]AsBeginSet XACT_ABORT onBEGIN TRANSACTIONDECLARE @errors INT--Number of errors--Breakdown while (select COUNT (*) from modifywkcontent where state=0 and results1= ' 0000 ' and results2= ' 0000 ' and results3=

Original: SQL Server optimizes row_number () with lock hints-programmers need to knowSome of the old pages in the site still use row_number similar window functions for paging, at this time if the situation of digging graves may require a long wait

Some of the old pages in the site still use row_number similar window functions for paging, at this time if the situation of digging graves may require a long wait and consumption is huge. Here we introduce a specific lock hint based on the

In a previous essay, simply mention the isolation level in SQL Server. The isolation level of SQL Server is implemented through the locking mechanism. Now go deeper and talk about locks in SQL Server.Before you begin, define the prerequisites:1. The