mysql transaction

1. View the current session isolation levelSELECT @ @tx_isolation;2. View the current isolation level of the systemSELECT @ @global. tx_isolation;3. Set the current session isolation levelSet tx_isolation= ' read-committed ';4. Set the current

The MySQL transaction isolation level is the "phantom read" phenomenon under "Repeatable-read" Statements about transaction control in the MySQL command line see this article:http://my.oschina.net/xinxingegeya/blog/296459 This film reference

ReviewOf the many storage engines in MySQL, only InnoDB supports transactions, and all of the transaction isolation levels described here refer to the transaction isolation level under InnoDB.READ UNCOMMITTED: One transaction can read uncommitted

MySQL TransactionMySQL transaction is mainly used to deal with large-scale and high-complexity data. For example, in the Personnel Management system, you delete a person, you need to delete the basic information of the person, but also to delete the

mysql5.x have been released for a long time, but there are many people think that MySQL is not support transaction processing, this has to blame them is ignorant, in fact, as long as your MySQL version support BDB or InnoDB table type, then your

/*There are two main ways to handle MySQL transactions.1, with Begin,rollback,commit to achieveBegin a transactionROLLBACK TRANSACTION RollbackCommit TRANSACTION Acknowledgement2, directly with set to change the MySQL automatic submission modeMySQL

First, the data engine InnoDB with Begin,rollback,commit to commit the transaction, begin the transaction after the error occurs ROLLBACK TRANSACTION rollback or no error on commit transaction commit confirmation completed.Start transaction begins

In a relational database, the importance of transactions is self-evident, as long as the database slightly understand that the transaction has four basic properties of ACID, and we do not know how the database is the implementation of these four

There is a bank account formCREATE TABLE account(ID int primary KEY,balance float);now there is a php program , to complete the number 1 yuan, transfer to number 2 on the accountTransactionsBasic : transactions are used to guarantee data

What is a transaction: A popular explanation is a complete set of operations on a database that contains one or more operations in a complete set of operations. It's too low to explain it. Official: A transaction is a complete logical unit executed

Transaction processing of a database guarantees the correctness of a set of processing results. Only data tables for INNODB and BDB engines in MySQL support transactions, and for MyISAM engine databases that do not support transactions, the same

Since the introduction of the InnoDB engine in MySQL, in MySQL support transactions, the transaction is a set of atomic query statements, but also a number of queries as a separate unit of work, usually by submitting a unit of work to complete the

In the previous article we described the approximate flow of transaction submissions in the case of closing binlog. The reason for shutting down Binlog is because the transaction commit process turns into a two-phase commit after the Binlog is

MyISAM storage engine in MySQL does not support transactions, InnoDB and BDB support transactionsA transaction is a contiguous set of database operations, which is indivisible, meaning that the set of operations is either fully successful or fails

Transaction processing in various management systems have a wide range of applications, such as personnel management system, many synchronous database operations need to use the transaction processing. For example, in the Personnel Management system,

1. What is a transactionA transaction is a combination of one or more database operation statements with acid,4 characteristics.Atomicity: Either all succeeds or all is undoneIsolation: Transactions are independent from one another and are not

The entire transaction can be written or revoked using a simple ROLLBACK and COMMIT statement with a reserved point. However, just for simple transactions to do this, more complex transactions may require partial commit or fallback. For example, the

Implementation Analysis of MySQL statement locking, mysql statement implementation Abstract: Analysis of Two SQL statement locks in MySQL Check the lock applied to the SQL statement under explain. SLQ1：select * from t1 where id = 10;SQL2：delete from

The entire transaction can be written or revoked using a simple ROLLBACK and COMMIT statement with a reserved point. However, just for simple transactions to do this, more complex transactions may require partial commit or fallback. For example, the

three ways to replicate MySQL Asynchronous asynchronous replication Fully synchronous full synchronous replication Semisynchronous Semi-synchronous replication Asynchronous Replication Principle: In