commit or rollback

Characteristics of Oracle TransactionsACID, an abbreviation for the four basic elements that a database transaction performs correctly. Contains: atomicity (atomicity), consistency (consistency), isolation (isolation), persistence (durability). A

A transaction is a continuous set of database operations, as if it were a single unit of work. In other words, it will never be a complete transaction unless each individual operation within that group is successful. If any operation in the

Content: 2-Connection This overview is from the JDBCTM Database Access from Javatm:a Tutorial and annotated Reference of the book. JavaSoft is currently preparing the book. This book is a tutorial and an important reference manual for JDBC, which

Definition and operation of Oracle transaction, process, and function transactions 1. The characteristics of the transaction acid:2. Atomicity (atomicity): The statement that makes up a transaction forms a logical single Yuan, you cannot only

A transaction is a mechanism that ensures that multiple SQL statements are treated as a single unit of work. Transactions have the following effects: Consistency: Simultaneous queries and updates do not conflict with each other, and other users do

transaction ID in DB2 Author: anon Time: 2005-08-12 17:39 Source: Internet Zebian: Small fishing Summary: Transaction IDs in DB2

Transaction is one of the core concepts in database system. An application can control the execution and stop of a transaction by starting, committing, rolling back, and so on. From the application point of view, a transaction often corresponds to a

asp.net| Transaction Processing Three kinds of transaction processingTransaction processing is often encountered in the processing of problems, often used methods have the following 3 kinds of summary collation as follows:Method 1: Write directly to

#事务 & Database Connection pool &dbutils# #事务 > Transaction actually refers to a set of actions that contain many single logic. As long as there is a logic that does not execute successfully, it is a failure. All data is returned to the original

Today, I met Nolock's problem, looked up some information, made a related understanding, summed up the more classic, simple two articles in this.Accessible by lift:Analysis of With (NOLOCK) in SQL ServerThe article would like to be a large excerpt,

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

One, Oracle's transactions:Refers to a series of actions for data manipulation. That is, the task of a transaction is to transform a database from one state to another, unlike a file system, which is a database-specific use.There are four major

1 PrefaceThe database large concurrency operation takes into account the deadlock and lock performance issues. See online most vague (especially update lock), so here is a concise explanation, for the following description of the convenient, here

1 PrefaceThe database large concurrency operation takes into account the deadlock and lock performance issues. See online most vague (especially update lock), so here is a concise explanation, for the following description of the convenient, here

Overview of LocksI. Why to introduce a lockConcurrent operations on a database by multiple users can lead to inconsistencies in the following data:Missing updatesA, a, two users read the same data and modify it, and one of the user's modifications

(a) Insert data mode oneInsert statement syntaxINSERT into table [(column [, Column ...])]VALUES (value [, value ...]);Use this syntax to insert only one piece of data into a table at a timeIf you assign a value in the order of the columns, you can

Recently encountered a situation, you need to restrict a stored procedure only one process is executing, the last execution completes after the next execution. This is similar to the thread synchronization problem in program development.Summarized

1ObjectiveThe database large concurrency operation takes into account the deadlock and lock performance issues. See online most vague (especially update lock), so here is a concise explanation, for the following description of the convenient, here

InnoDB Overview InnoDB provides MySQL with a transaction-safe (acid-compatible) storage engine with Commit, rollback, and crash resiliency. InnoDB locks the row-level and also provides an Oracle-style, non-locking read in the SELECT statement. These

SQL Server lock type (SQL) Favorites 1.　　HOLDLOCK: Holds a shared lock on the table until the entire transaction ends, rather than releasing the added lock immediately after the statement is executed.   2.　　NOLOCK: No shared and exclusive locks