rollback transaction

Copy Code code as follows: ALTER proc [dbo]. [Sp_common_paypal_addinfo] ( @paypalsql varchar (max),--Paypalsql statement that does not contain a user table @paypalusersql varchar (max),--The SQL statement for the PayPal user table @ebaysql

Preface: Transactions are a major part of an OLTP system. It manages data consistency and data concurrency issues, and when multiple resources are read or modified with the same data, SQL Server uses a locking mechanism to ensure that the data in

Notes | transaction processing Understanding SQL Incident Handling1 The work done by the statement during SQL transaction can be canceled (using the rollback statement) before it is permanently written to the database. Commit tells the DBMS to make

In the database software, the core is to query the database records to add modify and delete operations, which is very critical and must be very careful to complete. In an existing program, there are often data loss or even system crashes due to

Data | data type Method 1. Delete First, then re-establish if exists (SELECT * from dbo.systypes where name = N ' Dt_ac_area ') EXEC sp_droptype N ' ssn ' Go SETUSER--The default is dbo Go EXEC sp_addtypen ' Dt_ac_area ', n ' char (3) ', n ' not

mysql| Stored Procedures | tutorials Author: MySQL AB; translation: Chen Bong Error Handling Exception Handling All right, now we're going to talk about exception handling. 1. Sample Problem:log of failures Problem example: Fault logging When an

I think the management of affairs should not belong to the Dubbo framework, Dubbo can only be managed by the transaction, Like JDBC and JMS are distributed resources that can be managed by transactions. Dubbo as long as the same behavior can be

What is a transaction?A transaction is an indivisible operation that either executes all or does not executeWhat's the use of business?Ensure the complete execution of a business.How do you use business?3.1 Classification of transactionsShow

First, the understanding of the business:1, the characteristics of the transaction:1) atomicity (atomicity): A transaction is a logical unit of work for a database, and it must be an atomic unit of work, either fully executed or not executed for its

1.MySQL Engine Overview 1.1 What is a storage engineWhen we record a video file, it can be converted to different formats such as mp4,avi,wmv, and on the computer's disk will also exist in different types of file system Windows common Ntfs,fat32,

After careful study, it is still a bit complicated to find the explicit transaction (display transaction) inside SQL Server. Here are some summaries:Commit TRANSACTION commits all nested transaction modifications. However, if the nested transaction

BEGIN TRANSACTION--Start transaction ROLLBACK TRANSACTION--ROLLBACK TRANSACTION COMMIT TRANSACTION--COMMIT transaction ALTER PROC Aaaasbegin Transactioninsert into   Stu (Stu_name,stu_sex) VALUES (' AA ', ' male ') if @ @rowcount =0 or @ @error <>0--

SQLite is a lightweight database, do not need any installation can be used, and open source, this as a developer of us is undoubtedly a big gospel.But in the process of using SQLite, you might have a headache for that incredibly slow performance

SQL transaction:1. Definition:A transaction is a series of operations performed as a single logical unit. Multiple operations are submitted to the system as a whole, either executed or not executed, and the transaction is an inseparable unit of work

Original: sql--BusinessSQL transaction:1. Definition:A transaction is a series of operations performed as a single logical unit. Multiple operations are submitted to the system as a whole, either executed or not executed, and the transaction is an

Hopefully this article will be able to articulate four concepts related to databases: transactions, database reads, isolation levels, lock mechanismsFirst, the businessFirst look at the Baidu Encyclopedia of the definition of database

SQL constraintsThere are several main SQL constraints:Not NULL: 　 The content used to control the field must not be empty (null).Unique: 　 control field content cannot be duplicated, and a table allows multiple Unique constraints.PRIMARY KEY: also

1 　　 beginTry2 　　 begin Transaction --Start a transaction3 　　 begin4 　　　　 Insert intoTable_a (COLUMNABCValues('1','2')5 　　 End6 　　 Commit Transaction --Commit a transaction7 　　 EndTry8 　　 beginCatch--Get Error9 　　　　 --Select Error_number ()

CREATEProc[Dbo].[Sys_rebate_equity]AsDeclare@fMemberIDvarchar50)--User IDDeclare@RebateDecimal18,2)--Total number of sharesBEGINBeginTryBeginTransaction--Start a transactionDECLARE Cursor1CURSORFor--Defining Cursors Cursor1Select Fmemberid,SUM

SQL transaction (Transaction) usage introduction and rollback instanceThe   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