What is MySQL's transaction and implementation

Source: Internet
Author: User
Tags ming

mSQL a regression test of a transaction, you can self-examine and understand the next transaction.

For example: Xiao Ming and small fly two people now have ¥100 in hand, suddenly small flying head of the problem said to Xiaoming ¥50, now they hand money is (Xiao Ming: ¥150, small fly: ¥50); So synchronization is the completion of a transaction, the following is the demo

Transaction ACID
Atomicity of Atomic
Conformance consistency
Isolation isolation
Persistent durability

var mysql = require (' mysql '); var connection = Mysql.createconnection ({    host: ' localhost ',    User: ' Root ',    Password: ',    database: ' Yudi '}); Connection.connect ();//Start a transaction connection.begintransaction (function (err) {    if (err) throw err;    Connection.query (' Update account1 set mny=0 where id=1 ', function (err,results) {        if (err) {            Connection.rollback (function () {                throw err;            })        throw err;    } Connection.query (' Update account2 set mny=200 where id=1 ', function (err,results) {    if (err) {//rollback a thing    Connection.rollback (function () {    throw err;})    throw err;} Commit a thing connection.commit (function (err) {    if (err) {        connection.rollback () (function () {            throw err;        })    throw err;} Console.log (' success ');});})        


What is MySQL's transaction and implementation

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