MySQL

MySQL Clear table is a very important operation, but also one of the most common operations, the following for you to detail the implementation of the MySQL empty table, I hope to be able to help you.Method 1: Rebuild the Library and tableOne.

[email protected] mysql]# cat autoinstall_mysql.sh#!/bin/bashpath=/bin:/sbin:/usr/bin:/usr/sbin:/opt/bin:/opt/sbin:~/binexport path # check  if user isrootif [ $ (id -u)  != "0"  ]; then    echo  

Table is a good way to distribute the pressure of the database.Table, the most straightforward meaning, is to divide a table structure into multiple tables, and then, can be in the same library, can also be placed in different libraries. (Vertical

1. Source/home/susie .../**.sql2. \. /home/susie/.../**.sqlBulk Import. sql filesFirst create a new main.sql, and then write in the Main.sql file:SOURCE C:/sql/1.sql;SOURCE C:/sql/2.sql;SOURCE C:/sql/3.sql;....After editing, then source

Create high-Performance Indexes 1An index is a data structure used by the storage engine to quickly find records, which is the basic function of an index.Indexes are important for good performance.Index optimization should be the most effective way

1. Show procedure status like ' stored procedure name '--queries the basic information of the stored procedure.650) this.width=650; "src=" Http://s2.51cto.com/wyfs02/M00/7D/57/wKiom1bmXT7x9CUNAAAcQsD3QiU300.png "title=" 1.PNG " alt=

This installation is mysql-5.7.10-linux-glibc2.5-x86_64.tar.gz versionshell> Groupadd MySQLShell> useradd-r-G MySQL MySQLShell> cd/usr/localShell> Tar zxvf/path/mysql-5.7.10-linux-glibc2.5-x86_64.tar.gzshell> MV mysql-5.7.10-linux-glibc2.5-x86_64

CentOS 7 's Yum source does not appear to be properly installed when MySQL mysql-sever file, need to go to the official web download# wget http://dev.mysql.com/get/mysql-community-release-el7-5.noarch.rpm# RPM-IVH

Basic syntax: Group_concat ([DISTINCT] field to connect [order by sort field Asc/desc] [Separator ' delimiter '])Initial data:　　Group by name, print money on one line, default ', ' delimited:Select AA. ' Name ' name, Group_concat (money) money from

First, the target nameMysqlSecond, the target versionMysql-5.6.24-win32.1432006610.zipThird, environmental informationSystem: Windows 7 Ultimate EditionFirewall: Off-note: remote login will fail if the firewall does not shut down or does not allow

Original: http://blog.csdn.net/minipeach/article/details/5325161/When doing the project due to business logic needs, the data table must be one row or more rows to join the row lock, for the simplest example, the book borrowing system. Suppose Id=1 '

Error code 1045Access denied for user ' root ' @ ' localhost ' (using Password:yes)The workaround is to reset the root user password by following the steps in the Windows platform:1. Log in to the system as a system administrator;2. If the MySQL

Mysql_insertGCC mysql_insert.c-o test-i/usr/include/mysql-l/usr/lib-lmysqlclient#include #include #include #define HOST "localhost"#define USERNAME "SERVER"#define PASSWORD "Server_password"#define DATABASE "Remote_control"int main (){Char device_id[

To add data through a stored procedure:drop procedureifexists t1;create procedure T1 () beginDECLAREI INTDEFAULT 0;DECLAREJ INTDEFAULT 0; while(I 15000000) DoINSERT into' Test ' (' Code ', ' name ') VALUES (' Sdfasdfas ', ' aaa '); SETi = i +1

This article will take MySQL 5.5.47 as an example, the CentOS 6.5 platform, the installation and setup of MySQL database. Source package mode installation 1. New MySQL user and user group Groupadd mysqluseradd-r-G mysql-m Mysqlyum install

Mysql performance optimization case study-Covering Index and SQL _NO_CACHEScenario The product has an image table pics with nearly 1 million data records and a related query statement. Due to the high execution frequency, I want to optimize this

Initialize the mysql root Password in MAC 1. Turn off the mysql service, open the mysql at the end of the system settings, and then turn mysql off first.   2. Generate a file named mysql-init, put in the file: a sentence, this sentence is

MySQL clears tablespace fragmentsCauses of fragmentation (1) the storage of a table is fragmented. When a row of content is deleted, the space in the row is blank and left blank. A large number of delete operations are performed within a period of

Mysql performance optimization case-Covering Index sharing, mysql Performance Optimization Scenario There is an image table in the product, with nearly 1 million data records, and a related query statement. Due to the high execution frequency, I

MySQL entry (3): mysql entry After writing two articles on MySQL getting started, I found that people who write books are still competent. At least people know how to orchestrate the knowledge points they want to talk about, I really don't know