MySQL

The third lesson of CentOS MySQL CombatLast two lessons1. Installation of MySQL2. mysql startup modeThe first one today: MySQL objectsSee which databases are currently available:show databases;drop database test;TRUNCATE TABLE mysql.db;MySQL view is

Import Database SQL file: Mysql-u user name-p database name change user password: mysqladmin-u root password "password" or update user SET Password=password ("New password") WHERE user= ' root ';Create databases: mysql> CREATE DATABASE testdatabases;

MySQL replication is a multi-MySQL database master from a synchronous scheme, characterized by asynchrony, widely used in a variety of situations where MySQL has higher performance and higher reliability requirements.Replication PrincipleMySQL

Download the MySQL installation package and note the number of system bits.Cd/usr/local/srcwget http://mirrors.sohu.com/mysql/MySQL-5.1/mysql-5.1.73-linux-i686-glibc23.tar.gzUnpack the installation package:Tar zxvf

Rights Management Create usersGrammar:???? Create user ' username ' @ ' hostname ' "" identified by ' password ';Example:Description???? User name must use quotation marks????‘ Hostname ' can be in the following categories:???? Ip????????????

1 /*Test "2 Call Sp_viewpage (3 ' * ' #查询字段4 , ' Userupdatelog ' #表名5 , ' 1=1 ' #条件6 , ' Id desc ' #排序7 , 1 #页码8 , #每页记录数9 , @totalcount #输出总记录数Ten , @pagecount #输出用页数 One ); A SELECT @totalcount, @pagecount; - */ - the DROP PROCEDURE IF EXISTS'

First, insert data record1. Insert the full data recordINSERT into table_nameVALUES (Value1,value2......valuen);2. Inserting part of a data recordINSERT into table_name (field1,field2,... FIELDN)VALUES (Value1,value2......valuen);3. Inserting more

Simple background: SQL injection is a very hot topic in the field of web security. SQL injection is mainly due to splicing SQL statements, the attacker through the passing of illegal parameters to make the stitching of SQL into

1. First download the Mysql.zip or mis-formatted file in MySQL's official website www.mysql.com or other web site currently 5.6 of nearly 300 m.2.zip Compressed package is the green version of the installation, directly with the DOS command to do

Mysql (requires more than 5.6) delays the replication configuration by setting the MASTER to master_delay parameter on the slave:Change MASTER to Master_delay = N;n is the number of seconds, the statement set from the database delay of n seconds,

1. Data typeref:http://www.runoob.com/mysql/mysql-data-types.htmlDecimal: single-/double-precision floating-point with no loss of precision 2. Backup/Restorebackup :c:\>mysqldump -u root-p mydb2 >d:\mydb2.sql carriage return (without semicolon end)

First, create a trigger1. Create a trigger that has an execution statementCREATE TRIGGER trigger_namebefore| After Trigger_event (insert| delete| UPDATE)On table_name for each ROW trigger_stmt;2. Create a trigger with multiple execution

Hint: the ' information_schema. Session_variables ' feature is disabled; See the documentation for ' show_compatibility_56 'The following transfers are from: http://blog.csdn.net/rudygao/article/details/50403107--Starting from mysql5.7.6 Information_

Mysql database usage and understanding (based on ubuntu14.0.4LTS64-bit)1. mysql database composition and related concepts first understand that mysql is a relational database. The biggest difference between mysql and non-relational databases is that

Database Operations and database operation statementsDatabase Operations create a database Syntax: Create database name [charset utf8 ]; Example: The essence of database creation: a directory with the same name as the database will be created in

MySQL record length and MySQL record length MySQL record length MySQL sets the maximum length of a record to 65535 bytes by default. The total number of bytes for all fields cannot exceed 65535. However, when the length of a field in MySQL is

Mysqlerrorcode & #39; 1064 & #39; troubleshooting Process The self-testing code in the afternoon has been stuck for an hour and a half on this update, greatly reducing the development productivity and releasing the troubleshooting process. Good

Notes on some commonly used data table operation statements in MySQL and mysql DATA statement notes 0. Create a table Create table Name (attribute name data type [integrity constraints], attribute name data type [integrity constraints], attribute

MySQL database installation diagram, mysql database Diagram Below is the MySQL installation diagram, with the executable file: http://www.jinhusns.com/Products/Download? Type = xcj download Start the mysql Installation Wizard and press "Next" to

MySQL series: Database Design Preface Here we will re-pick up the database design knowledge that we were not very familiar with before and make a simple sorting of knowledge. Previously, I thought that database design is nothing more than creating a