autocommit

MySQL's transactional support is not tied to the MySQL server itself, but is related to the storage engine 1. MyISAM: Transaction not supported, for read-only program lift high performance 2.InnoDB: Acid transaction, row level lock, concurrent

InnoDB How to implement a row lockInnoDB row locks are implemented by locking the index entries on the index, which is different from Oracle, which is achieved by locking the corresponding data rows in the data block. InnoDB This type of row lock

This article provides an excellent mechanism to define, encapsulate, and manage transactions. For more information, see This article provides an excellent mechanism to define, encapsulate, and manage transactions. For more information, see ACID:

MySQL default data submission operation mode is autocommit mode (autocommit). This means that unless a transaction is explicitly started, each query is executed automatically as a separate transaction. We can change whether the autocommit mode is

Start transaction,COMMIT, AndROLLBACKSyntax From: http://dev.mysql.com/doc/refman/5.0/en/commit.html Of course, the article noted from MySQL, but MySQL, SQL Server, Oracle start tracmsaction, commit, and rollback syntax are no problem in DML. I hope

ACID: Atomic, Consistent, Isolated, Durable A storage program provides an excellent mechanism to define, encapsulate, and manage transactions. 1. MySQL transaction support 1) MySQL transaction support is not bound to the MySQL server itself, but

Recent projects, as it relates to the use of optimistic and pessimistic locks in MySQL data, summarize the knowledge of optimistic and pessimistic locks in conjunction with project and online knowledge points.Pessimistic Lock IntroductionPessimistic

Oracle supported SQL directives can be divided into data manipulation language statements, data definition language statements, transaction control statements, session control statements, and several other types:1. Data Manipulation Language

For MyISAM types of tables, you can quickly import large amounts of data in the following ways:ALTER TABLE tblname DISABLE KEYS;Loading the dataALTER TABLE tblname ENABLE KEYS;These two commands are used to open or close an update for a non-unique

sqlsession Understanding First, create sqlsession 1. Create a transaction A. Transaction factory creates a transaction object (Connection object, transaction level, whether Autocommit) based on DataSourceB. Transaction factory create a transaction

Perl DBI Programming Reading notes, in the original text see:http://www.ibm.com/developerworks/cn/linux/l-cn-perldbi/In order to communicate with the database, the Perl community developed a unified Database communication interface module: DBI. DBI,

1. The concept of database transactions:1) The purpose of the transaction is to ensure the integrity of the data in the database;2) Imagine a bank transfer process, if two steps, the first step is a's account-1000, the second step is B's account +100

Here is the MHA from boot, to failover's complete manager.log, and all of the MySQL General.log in the cluster. We can learn more about the workings of MHA through these logs. There is a lot of help in using good MHA.The architecture is as

(Translator: One of the difficulties with using EF to develop applications is their DbContext lifecycle management, and whether your management strategy will support the need for upper-level services to use stand-alone transactions, nested

Reference Manual | Chinese InnoDB chinese reference Manual---Dog dog (heart sail) Translation 8 InnoDB transaction Mode and lock In InnoDB transaction mode, the goal has been to combine the best properties of a multiversioning database to

In the previous article, the blog post on transaction processing has not been written clearly and is very obscure to read. Very difficult to understand, so there are some information to help understand. Excuse me!About MySQL transaction processing

First, mysqli connections are permanent connections, while mysql does not. What does it mean? Mysql will re-open a new process whenever it is used for the second time, while mysql uses only the same process, in this way, the pressure on the server

If you spend a lot of time working on Django database transactions, you'll see that it's confusing. In the past, just providing a simple base document, to know exactly how it was used, must also be done by creating and executing Django transactions.

First, mysqli connections are permanent connections, while mysql does not. What does it mean? Mysql will re-open a new process whenever it is used for the second time, while mysqli only uses the same process, which can greatly reduce the pressure on

First, the MYSQLI connection is a permanent connection, and MySQL is a non-permanent connection. What do you mean? The MySQL connection will reopen a new process whenever it is used for the second time, while Mysqli will only use the same process,