MySQL

Today finally solved the database Chinese garbled problem, share out let more people as reference, we enter the theme:If the MySQL database is not set when the encoding format, in the future development, the Chinese garbled will be a headache, so I

When installing the mysql5.7+ version, if you find the root directory, missing Data folder, please do not copy the other version of the Data folder!Open the cmd Command window and go to the bin directory of the MySQL installation directory. Then

Want to insert a piece of data, to avoid repeated insertions, and do not want to toss two back to the database connection operation, you can refer to the following methods.INSERT into Table (Column1,column2,column3 ... columnn) SELECT value1,value2,

MySQL Download URL: http://dev.mysql.com/downloads/, binary or zip compression package can be, select the time to pay attention to the MySQL operating system environment and configuration requirements.1) I downloaded is: mysql_5.6.24_winx64.zip,

Modify the My.ini file in the[MySQL]Default-character-set=gbk[Mysqld]# The default character set that would be used if a new schema or table is# created and no character set is definedCharacter-set-server=utf8After modifying, restart MySQL.

1. Download the MySQL repo sourcewget http://repo.mysql.com/mysql-community-release-el7-5.noarch.rpm2. Install the MYSQL-COMMUNITY-RELEASE-EL7-5.NOARCH.RPM packageRPM-IVH mysql-community-release-el7-5.noarch.rpmAfter installing this package, you

Whether the log is enabledMysql>show variables like ' log_bin ';How to know the current logMysql> Show master status;See binary log files with MysqlbinlogShell>mysqlbinlog mail-bin.000001 (to write absolute problem path d://)or Shell>mysqlbinlog

# #5.6 and 5.7 have a slightly different installation, record the installation processInstallation Environment:=====================OS, CentOS 6.7 x64installation process=====================650) this.width=650; "src=" Http://s2.51cto.com/wyfs02/M00/

The previous query is just a random look at the results, because found that the number of each query is very small, of course, it is now. But efficiency has always been the pursuit of the programmer, I will learn more about the gap.The first is the

The        mysql built-in replication feature is the foundation for building MySQL-based large-scale, high-performance applications that use the so-called "horizontal scaling" architecture.          Replication solves the basic problem of keeping

1th step, yum install MySQL[Email protected] ~]# yum-y install Mysql-serverInstallation Result:Installed:Mysql-server.x86_64 0:5.1.73-3.el6_5Dependency installed:mysql.x86_64 0:5.1.73-3.el6_5 perl-dbd-mysql.x86_64 0:4.013-3.el6 Perl-dbi.x86_64 0:1.60

To create an index:MySQL creates an index with the following syntax:CREATE [unique| Fulltext| SPATIAL] INDEX index_name [USING Index_type] on table_name (index_col_name,...)The corresponding syntax variable information is as follows:[unique|

MySQL settings allow extranet access (graphics)1. Open Mysql.exe (MySQL Command line Client), enter the password2, input: use MySQL;3, query host input: Select User,host from User;4, create the host (if there is a "%" this host value, then skip this

1, basic operation1 Create databades database name; #创建数据库 23show databases; #显示存在的数据库 45 drop database name #删除数据库2, Database Storage Engine Introduction1 show engines \g; 2 3 ' have% ' ; 4 5 querying MySQL-supported storage enginesInnoDB

Mycat journey (3) ---- global serial number of Mycat, mycat ---- mycatI. Local file Mode Principle: in this way, MyCAT configures the sequence to a file. When the sequence configuration is used, MyCAT changes the sequence_conf.properties file in

MySQL insert statement usage and optimization tutorial, mysqlinsert MySQL tables use the insert into SQL statement to INSERT data.You can use the mysql> Command Prompt window to insert data into the data table, or use the PHP script to insert

Database introduction, database   1. What is a database? Database: Database, the medium for efficient data storage and processing (mainly two types of media: disk and memory ). 2. Database Classification Based on different storage media,

MySQL uses the left join method when the data in the right table is not unique. 1. Basic left join usage Mysql left join statement formatA left join B ON condition expression Left join is based on table A. Table A is the left table, and table B is

In Linux, compile and install MySQL and parse the basic configuration process. Install dependency: CentOS: # yum -y install wget gcc-c++ cmake make bison ncurses-devel perl unzip Ubuntu: (using ubuntu requires a lot of root permissions. Please note

MySQL entry (2), mysql entryI. MySQL Overview MySQL is a very popular open source database. when I switched from Oracle to MySQL, I felt the most profound point was that this guy was actually separated by Server and Storage! What's more, it turns