mysql query update multiple fields

Analysis of the lock table mechanism during mysql Query update Analysis on the lock table mechanism during mysql Query update To optimize mysql in high concurrency, it is necessary to understand the lock table mechanism when mysql queries an

One, MySQL installationInstall MySQL under CentOS Please open: http://www.centoscn.com/CentosServer/sql/2013/0817/1285.htmlIi. several important directories of MySQLMySQL installation is not as if SQL Server is installed by default in a directory,

Concrete Example 1. PHP Server ComponentsFor beginners, it is recommended to use the integrated server component, which already includes PHP, Apache, Mysql and other services, eliminating the time spent by developers in the tedious configuration

Mysql Proxy Lua Read and write separation settingsI. Read-Write separation instructions Read-Write separation (Read/write splitting), the basic principle is to let the main database processing transaction increment, change, delete operation

MySQL Study Notes summary, mysql Study Notes Slow SQL: A Query whose execution time exceeds the specified time range is called a slow query.In MySQL, how does one record slow SQL statements?A: You can set the following information in my.

An introduction The principle of two indexes Three-indexed data structures Three MySQL index management Four Test indexes Five correct use index Six query optimization artifact-explain The basic steps of seven-slow query

Usage of INSERT, UPDATE, DELETE, and REPLACE statements in MySQL database bitsCN.com MySQL database insert and update statementsThe SQL statements used to operate databases are generally divided into two types: Query statements, SELECT statements,

This article is a MySQL database insert, UPDATE, delete and replace statements in the use of detailed analysis of the introduction, the need for friends to refer to the MySQL database insert and UPDATE statements Introduction: The SQL used to

Execute an SQL query and UPDATE multiple rows to record bitsCN.com Execute an SQL query and UPDATE multiple rows of records Generally, the following SQL statement is used to update the field value: 1 UPDATE mytable SET myfield = 'value' WHERE

1. Export the entire database Mysqldump-u user name-p--default-character-set=latin1 Database name > exported file name (database default encoding is latin1) Mysqldump-u wcnc-p SMGP_APPS_WCNC > Wcnc.sql 2. Export a table Mysqldump-u user name-P