MySQL

bigintInteger data (all numbers) from -2^63 (-9223372036854775808) to 2^63-1 (9223372036854775807). The storage size is 8 bytes.P.S. bigint already has length, in MySQL build table length, just used to display the number of bits, general bigint (20),

Environment: Windows 7+wamp server+mysql 5.7.9View MySQL default encoding: like ' character% ' Character_set_client is the client-side encoding method Character_set_connection the encoding used to establish the connection Encoding

Enter the MySQL directory input command line＃ LessLocalhost.localdomain.err160703 -:xx: AMysqld_safe starting mysqld daemon with databases from/usr/local/var/MySQL .- --03T12:xx: A.397109Z0[Warning] TIMESTAMP with implicit the DEFAULT value is

The output of the Processlist command shows which threads are running and can help identify problematic query statements, using this command in two ways.1. Enter Mysqladmin processlist into the Mysql/bin directory;2. Start MySQL and enter show

MySQL can support multiple platforms, such as WINDOWS,UNIX,FREEBSD or other Linux systems. This essay records the process of installing MySQL using source code on CentOS 7.1. Download the source codeSelect the image file to use Beiligong:Enter the

First, the experimental environmentSystem: centos6.5Software: mysql-5.5.32.tar.gzSecond, the experimental steps Basic concept and principle of master-slave replication MySQL Replication is an asynchronous copy process, copied from one

C:\Program Files\mysql\mysql Server 5.1\bin1.1 Defining a stored procedure with no parametersDefine statement End with//Delimiter//CREATE PROCEDURE Proc_teacher_noparam ()BeginSELECT * from teacher;End//Define statement end use;delimiter;1.2.

Learn Mysql:mysql with Mr. Wang character type of data typeTeacher: Wang Shaohua QQ Group: 483773664 Study Content: Kinds of string types and their characteristicsThe similarities and differences between char and varcharThe string type is the data

1. Create a statement CREATE DATABASE database_name//Creating databasesDelete TableDROP TABLE IF EXISTS ' t_social_user_extend ';//Build tableCREATE TABLE ' t_social_user_extend ' (' id ' bigint (20) not NULL auto_increment, ' user_id ' bigint ()

Second, SQL basic Operation statement SQL is a typical non-procedural programming language that is characterized by specifying only what data is manipulated , and What operations are performed on the data, and how those operations are

MySQL has 5 million of data, but most of it is repeated, the real 1.8 million, so how to put these repeated data out, in the Internet to find a circle, a lot of the code is not in such a low efficiency, their own pondering the combination of a bit,

MySQL replication in the industry has called: MySQL synchronization, AB replication and so on. The professional name is called: Copy. Replication is one-way asynchronous replication, copying from one MySQL (Master) to another MySQL (Slave).

MySQL Database model under Linux, Managing table indexesMySQL database and its model under 1.linux1.1.SHOW TABLE STATUS like ' user ' \g #查看表的存储引擎SHOW ENGINES; #查看数据库支持的存储引擎Client tools: MySQL, Mysqladmin, mysqldump, Mysqlimport,

-Create DATABASE Sysdb default Character set utf8;-delete databases drop database sysdb;-view The default character set of the database show create database sysdb;-modify the databases alter SYSDB default character set gbk;#### table

This script backs up data from the remote host or the database on the local host to local.Back up the MySQL database in addition to Information_schema, Performance_schema, MySQL and other production libraries from the library.Back up each library in

1.MySQL Getting Started with master-slave replicationFirst, let's look at a diagram:Operations that affect the MYSQL-A database are written to the local log system A after the database is executed Suppose that the real-time database

Mysql Advantages and features Excellent performance, stable service, very few abnormal downtime; Open source code without version constraints, autonomy and low cost of use; A long history, community and users are very active, encountered

Database Structure Design and how to maximize the use of indexes and database Indexes For example, a message table The structure is as follows: Id (auto-incrementing primary key) Content (Content) UserId (speaker Id) IsWonderful (whether it is a

MySQL string functions (recommended) and mysql Functions I. ASCII ASCII (str) Returns the ASCII code value of the leftmost character of the str string. If str is a Null String, 0 is returned. If 'str' is NULL, return NULL. 2. ORD ORD (str) If the

Mysql 5.7.13 installation and configuration notes (Mac OS), mysql5.7.13 1. Install MySQL5.7.13Go to the MySQL official website at http://dev.mysql.com/downloads/mysql/, and download mysqlinstallable dmgversionMysql-5.7.13-osx10.11-x86_64. dmgThe