MySQL

Go-sql-driver package is a third party Package /http/github.com/go-sql-driver/mysql directly below the code Package Mainimport ("Database/sql" "Fmt" _ "Github.com/go-sql-driver/mysql") func main () {//Connect database db, err: = SQL. Open ("MySQL",

Remember the MySQL data file operation experience want to get the latest information of a project, do function upgrade use, back up a copy of data also as local test data, file a bit large, I directly through the remote phpMyAdmin program export,

Method One (stored procedure implementation):BeginDECLARE cnt INT DEFAULT 0;Select COUNT (*) into CNT from user;Set cnt = Round (cnt*0.9)-1;SELECT * from user limit CNT, 1;EndMethod two (direct query, only when the query permissions can be

1. DescriptionWhen you delete all data for a table with auto_increment columns:(1) For the MyISAM table, the delete table in all data without any risk, random toss;(2) for the InnoDB table, in the Delete table all the data, it is possible to risk,

The distinct (STR) function is used to remove duplicate records, but it is only possible to repeat for a certain field. For example: SELECT DISTINCT (name) from TableName; However, if you want to query the records of other field values, I started

Background: The previously implemented MySQL synchronous replication feature (see author before article http://blog.csdn.net/kingofworld/article/details/39210937) is just a dual-machine hot standby feature, It is not possible to automatically

Before installing, please put the CD in the CD-ROM drive, if it is a virtual machine, please load two CD/DVD, CD/DVD2, and then upload the Nginx installation Pack WinSCP tool to Linux/usr/local/ Src. When the script is installed, it is repeatedly

Installation1. To download MySQL Community version of MySQL website, (the author downloads mysql-5.6.21) MySQL is divided into commercial version (Enterprise) and Community Edition (Community), the business Edition is charged, the Community edition

MySQL UPDATE statement is simple, update a field of the data, generally write:UPDATE SET = ' value ' WHERE = ' Other_value ';If you update the same field with the same value, MySQL is also simple, modify where you can:UPDATE SET = ' value ' WHERE

Backup and Recovery: backups make the data in the database more efficient and secure . Backup/Restore Policy:Some factors to consider when making a backup or recovery: determining whether the storage engine for the tables to be

1. Data type:Bool,float,doubleDecimal (m,d) M is the total number of decimal places (precision), andD is the number of digits following the point (Scale), and the maximum number of decimal integers (M) is 65.smallint a small integer. The signed

MySQL database dual-Machine hot backup 1, MySQL database does not have incremental backup mechanismBackup is a big problem when the amount of data is too large. Fortunately, MySQL database provides a mechanism of master-slave backup, in fact, all

Commands to back up the MySQL databaseMysqldump-hhostname-uusername-ppassword databasename > Backupfile.sqlBacking up the MySQL database to a format with a delete tableBacking up the MySQL database is a format with a delete table that allows the

1. About the MySQL character setMySQL Character set support (Character set supports) has two aspects: The character set (Character set) and the Sort method (Collation). MySQL support for character sets is refined to four levels: server, database,

Do not restart to modify the MySQL root password--------------------2014/09/28First, generally forget the password solution, need to restart MySQL1, Skip-grant-tablesOur common approach is to use the Skip-grant-tables option, and MYSQLD server does

MySQL allows annotations to be used in SQL code. This is useful for reading code. MySQL server supports 3 kinds of annotation styles:1, "#" commentAll characters starting with the "#" character to the end of the line.Mysql> Select @schema; #which

Author:echo Chen (Chenbin) Email:[email protected] Blog:blog.csdn.net/chen19870707 Date:september 9th,       Explain time ago, the game server is always very slow to stop the service, fortunately, the game database is open Bin-log,

SQL templates created for Mysql databases, tables, character sets, and primary and Foreign keys # If a database with the same name exists, delete the database with the same name.Drop database if exists cfms;# If the cfms database whose

Import and Export mysql database commands in linux 1. Export the database: Mysqldump command1. Export data and Table Structure:Mysqldump-u username-p Password Database Name> database name. SQL#/Usr/local/mysql/bin/mysqldump-uroot-p abc> abc.

Mysql error 1366-Incorrect integer value how to solve? This article mainly introduces how to solve the Mysql error 1366-Incorrect integer value. This article solves the problem by modifying the default value of the field. For more information,