begin transaction

Write a simple INSERT statement in SQL Server and submit: INSERT into EMP (empno,ename) VALUES (2, ' Dan '); Commit Result Error: Message 3902, Level 16, State 1, row 3rd COMMIT TRANSACTION request does not have a corresponding BEGIN TRANSACTION.

 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

SQL Server concurrent processing, update solution discussion, SQL Server Preface In this section, we will talk about the most common situation of concurrency, that is, update. If no row record exists in concurrency, insert it. At this time, it is

If the value of @ trancount is different from that of process execution when the stored procedure is completed, a 266 information error is generated. This error is not generated by the same condition in the trigger. When a stored procedure is

Document directory 2.1 How does the nested transaction roll back the outermost transaction affect the internal transaction? 2.2 How about nested transactions roll back internal nested transactions? Save transaction rollback point-you can select

server| Transaction Processing Transaction definition: A transaction is a single unit of work. If a transaction succeeds, all data changes made in that transaction are commit to become a permanent part of the database. If the transaction encounters

1. Basic concepts of transactions A transaction is a logical unit of work composed of a series of tasks. All tasks in this logical unit must be completed or all fail as a whole. In SQL Server, no matter whether or not begin transaction is

  Transaction definition: A transaction is a single unit of work. If a transaction succeeds, all data changes made in the transaction will be committed and become a permanent component of the database. If the transaction encounters an error and

1.1.1 Summary I'm sure you're familiar with SQL Transcation. However, it ensures the data consistency and security of the database, especially when performing additions and deletions to the data, if an exception and error occurs, it triggers a

Transaction definition:A transaction is a single unit of work. If a transaction succeeds, all data changes made in the transaction areCommits and becomes a permanent part of the database. If the transaction encounters an error and must be canceled

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

1. Summary This section describes how to deploy a Database Upgrade to the full SQL Server database. It is different from the Database Upgrade and deployment in Chapter 9th (Chapter 9th is deployed to the SQL Server Compact database ). Reminder:

first, the basic introduction SQLite is a self-sustaining (self-contained), server-free, 0-configured, transactional-type relational database engine. Because he is very small, it can also be built into your application as an embedded database.

A Program execution unit (unit) that accesses and may update various data items in a database consists of multiple SQL statements that must be executed as a wholeThese SQL statements are submitted to the system as a whole, either executed or not

First, write it in front.Recently has been thinking about a problem, what can let us do not appear impetuous, the real calm down, the heart to feel, intentions to answer everyone's questions, intentions to help others. The reality of life, often let

first, write it in front.Recently has been thinking about a problem, what can let us do not appear impetuous, the real calm down, the heart to feel, intentions to answer everyone's questions, intentions to help others. The reality of life, often let

first, the basic concept The SQL Server database engine ignores the commit of the internal transaction. The internal transaction is committed or rolled back according to the action taken at the end of the most external transaction. If an external

ObjectiveIn this section we talk about the most common situation in concurrency is updated, if there is no row record in the concurrency inserted, at this time is not processed very easy to insert duplicate key situation, this article we describe

14 14th Chapter TriggerDML--after/for UPDATE, INSERT, delete--for cascade delete--INSTEAD of triggers before the time, equivalent to BEFINSERTED, DELETED two sheets to make good use of. when you create a DML trigger, you cannot use the following

I. Basic Introduction SQLite is a self-contained, serverless, zero-configuration, and transactional relational database engine. Because it is very small, it can also be built into your application as an embedded database. SQLite is used in Solaris 1