autocommit

The following statement locks a row of data and starts reading the data. No second person reads the data until it is deleted. The following statement locks a row of data and starts reading the data. No second person reads the data until it is

START TRANSACTION [with consistent snapshot]begin [work]commit [Work] [and [No] CHAIN] [[No] release]rollback [work] [and [NO] CHAIN] [[NO] Release]set autocommit = {0 | 1}These statements provide control over use of transactions: START

What is a transaction?In the MySQL environment, a transaction is composed of one or more SQL statements as a separate unit. Each SQL statement in this unit is mutually dependent, and the unit as a whole is inseparable. If a statement in a unit

Copy Code code as follows: mysql_query ("Set autocommit=0"); $list _one = $db->fetch_first ("SELECT * from prizes where id =". $id. " For UPDATE "); $db->query ("DELETE from prizes WHERE id =". $list _one[' id ')); mysql_query

MyISAM: This is the default type, which is based on the traditional ISAM type, ISAM is an abbreviation for indexed sequential access method (indexed sequential access methods), which is the standard way to store records and files. Compared to other

Start transaction, commit, and rollback syntax Start transaction | begin [work] Commit [work] [and [no] Chain] [[No] Release] Rollback [work] [and [no] Chain] [[No] Release] Set autocommit = {0 | 1} The START transaction or begin statement can start

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

If you spend a lot of time doing Django database transactions, you'll learn that this is confusing. In the past, only a simple basic document was provided, and in order to know exactly how it was used, it was also necessary to create and perform

Start transaction, commit, and rollback syntax Start transaction | begin [work]Commit [work] [and [no] Chain] [[No] Release]Rollback [work] [and [no] Chain] [[No] Release]Set autocommit = {0 | 1} The START transaction or begin statement can start a

MySQL (14) ---------- transaction processing, mysql ---------- The previous article's blog on transaction processing was not clearly written, difficult to read, and difficult to understand. So I have organized some documents to help me understand.

Insert statement Syntax: INSERT into table [(Column1, Column2 ...)] VALUES (value1, value2 ...); Description: INSERT statement inserts a record into the table at a time. When the default field Name list is listed, you should explicitly set the new

Managing Database TransactionsThe Django Framework provides several ways to control and manage database transactions. (The following Django框架 will be simplified Django so that the reader can fill in 框架 two words by himself)Default transactional

In fact, this is more boring-the client is the Lantin character set, after MySQL for the U8 character set, Mycat in the middle in the end what role.Again the environment for this verification:Mac OS 10.11.2MySQL 5.6Mycat 1.5OK, start our

Preface: The previous article on the transaction processing of the post did not write clearly, read it is very obscure, difficult to understand, so there are some information to help understand, forgive me!About MySQL transaction processing learning

about the lock in MySQLIn a concurrent environment, there is the possibility of dirty reads (Dirty read), non-repeatable reads (unrepeatable read), Phantom reads (Phantom read), update loss (Lost update), etc., so MySQL introduces a lot of lock

All contents of this study : mybatislearningCheck:query user information according to ID, get a user informationadd code in the User.xml file: select * from User where id=#{id} In the test code, Test.java:Query user

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

Source: ReprintMySQL'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 support, row level

Source: The transaction support reproduced in MySQL 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

Transferred from: http://www.cnblogs.com/ymy124/p/3718439.htmlMySQL'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