commit rollback

From the functional partition, the SQL language can be divided into three categories: Ddl,dml and DCL.1. DDL (Data Definition Language)A data definition language that defines and manages the language of all objects in a SQL

from the functional partition, the SQL language can be divided into three categories: Ddl,dml and DCL.1. DDL (Data Definition Language)A data definition language that defines and manages the language of all objects in a SQL

In this Document Goal Solution Overview Steps in writing Java Concurrent program Template

Transaction:definition: A transaction is a set of logical units containing one or more statements, each of which is an atomic unit, the statement in the transaction as a whole, either committed together, on the database, the database data is

What is a transaction? Database transaction (abbreviation: Transaction) is a logical unit in the execution process of database management system, which consists of a limited database operation sequence. A transaction should have 4 properties:

From the functional partition, the SQL language can be divided into three categories: Ddl,dml and DCL.1. DDL (Data Definition Language)A data definition language that defines and manages the language of all objects in a SQL

Oracle row lock Select for updateStudied: 50490157Studied: 7948282Statement: An SQL statement. Session: A connection generated by an Oracle user, a user can produce multiple sessions, but is independent of each other. Transaction: All the changes

DDL (data definition Language), which is used to create/modify/delete various objects of a database, such as tables, views, indexes, synonyms, sequences, and so on. DDL statements mainly include CREATE creation, ALTER modification, TRUNCATE

Mysql optimization and mysql Performance Optimization For a data-centric application, the quality of the database directly affects the performance of the program, so the database performance is crucial. I To ensure database efficiency, do the

This article mainly introduced the Python development SQLite3 database related operation, combined with the instance form more detailed analysis of Python operation SQLite3 database connection, query, insert, UPDATE, delete, close and other related

This article mainly introduces the design defects and solutions for CodeIgniter framework database transaction processing. It can also be said that it is a small BUG. friends who use CodeIgniter transactions will encounter this problem, for more

1. Create a WinForm installation project using the VS bring-your-own packaging toolDevelopment environment: VS. AccessOperating system: Windows XPDevelopment language: C #Step: The first step: open the development environment VS2008, new project,

SQLite3 database operations related to Python development [connection, query, insert, update, delete, close, etc.], pythonsqlite3 This article describes how to develop a SQLite3 database using Python. We will share this with you for your reference.

1. Introduction to data enginesInMySQL5.1, MySQL AB introduced a new plug-in storage engine architecture, allowing the storage engine to be loaded into the new MySQL server being migrated.Use the MySQL plug-in storage engine architecture to

When a frequent commitrollback or disk I/O problem occurs and a large number of physical read/write contention occurs, we will often see that the LOGFILESYNC wait event appears in the TOP When a frequent commit/rollback or disk I/O problem occurs

Mysql triggers and transaction operations Trigger syntax Create a trigger: Create trigger trigger_name trigger_time trigger_eventON tbl_name for each row trigger_stmt; Trigger_time is the time when the program is triggered. It can be BEFORE or AFTER

Turn from: http://www.cnblogs.com/holbrook/archive/2012/12/30/2839842.html (think written too good, just stick it in this handy review)JPA defines the standards for Java ORM and the entity Operations API. This article extracts some of the key

In my" . NetBrief Discussion on the nature of transactions"In this article, we understand the transaction model as a whole. In our mind, we can have a global transaction processing structure, eliminate the dependency on database transactions, and re-

Original article: http://blogs.msdn.com/ B /apgcdsd/archive/2011/12/30/10251946.aspx Intercept a paragraph for future referenceHow does the log file affect the startup of my database? Whether your SQL Server is started, you can recover a

Transaction Processing A transaction is a mechanism that ensures that multiple SQL statements are treated as a single work order. To process. Transactions have the following roles: * Consistency: the query and update operations at the same time do