rollback transaction

Python database (mysql) operation, pythonmysql Preface:Recently, I started to learn django and learned the web framework. Now I feel that I have a lot of knowledge. Happy ~~ This blog sorts and writes down the basic database operations, with little

　　1. A trigger is a special stored procedure. It cannot be explicitly called. Instead, it is automatically activated when a record is inserted, updated, or deleted into the table.Therefore, triggers can be used to implement complex integrity

This tutorial is about SQL Server transactions, exceptions, and cursors. I hope it will help you.1. Features of transactionsA transaction consists of several T-SQL commands, and all the commands are submitted to the database tutorial system one

One: A trigger is a special stored procedure that cannot be invoked explicitly, but is automatically activated when you insert records into a table ﹑ update records or delete records. So triggers can be used to implement complex integrity

　　One: A trigger is a special stored procedure that cannot be invoked explicitly, but is automatically activated when you insert records into a table ﹑ update records or delete records. so triggers can be used to implement complex integrity

In Oracle databases, Undo has three main roles: providing consistent read (consistent read), ROLLBACK TRANSACTION (Rollback Transaction), and instance recovery (Instance Recovery). Consistency reading is relative to dirty read (Dirty read).

A proxy is a common design pattern designed to provide a proxy for other objects to control access to an object. The proxy class is responsible for preprocessing messages for the delegate class, filtering messages and forwarding messages, and

Stored Procedure | encryption | decryption Actually for the paste j9988+ original BEGIN TRANSACTION--playyuer Original exec sp_decrypt ' appsp_test '--j9988 original Rollback TRANSACTION--playyuer Original Or: Or simply wrap the j9988 in

1. The concept of a transactionA thing is a mechanism, a sequence of operations that contains a set of operations commands for a database that either executes entirely or does not execute. So the thing is a set of inseparable things logical unit,

Transferred from: http://www.cnblogs.com/hoojo/archive/2011/07/19/2110325.htmlØ BusinessIn a database, it is sometimes necessary to run instructions from multiple steps as a whole that either succeeds or fails altogether, which requires a

MySQL Database interface program: https://sourceforge.net/projects/mysql-python/The approximate steps for manipulating the database are as follows:1: First create a database of the connection object connection;2: The cursor object is then created

One, SQL transaction1. What is a transaction: a transaction is an inseparable unit of work that is used as the smallest control unit when concurrent operations are performed on the database system. All of the database operations commands that he

1 Create Account TableCREATE TABLE account (ID INT PRIMARY KEY auto_increment,name VARCHAR ($), balance NUMERIC (10.2)); INSERT into account (NAME, Balance) VALUES (' Zs ', 100000), insert into account (Name,balance) VALUES (' ls ', 100000); Insert

One: A trigger is a special stored procedure that cannot be invoked explicitly, but is automatically activated when you insert records into a table ﹑ update records or delete records. So triggers can be used to implement complex integrity

Acid:atomic, consistent, Isolated, durable The store program provides an excellent mechanism for defining, encapsulating, and managing transactions. 1,mysql Transaction Support 1 The MySQL transaction support is not tied to the MySQL server itself,

Java Training,Android training,IOS Training,. Net Training , look forward to communicating with you! Transactions, views, indexes:Transactions: When the "one step" in the logic of life requires multiple SQL to complete, the transaction must

It is recommended that you read the stored procedure first:SQL Server Stored ProceduresØ BusinessIn a database, it is sometimes necessary to run instructions from multiple steps as a whole that either succeeds or fails altogether, which requires a

In this tutorial, let's take a look at the SQL Server transactions, exceptions, and cursors. I hope this will help you. 1. Transaction features a transaction consists of several T-SQL commands, and all the commands last night a whole submitted to

One, the business Part 1. Introduction to TransactionsTo do one thing, this one thing has multiple constituent units, which are either successful at the same time or fail at the same time. A account transferred to B account money, the operation of

1. Problem Java code Connection conn = Datasourceutils.getconnection (); //Open transaction Conn.setautocommit (false); try { Object RetVal = Callback.doinconnection (conn); Conn.commit (); //Commit a transaction return retVal;