MySQL

This semester studied the principle of database system, did the experiment, mark a remember.Directory (without a key directory not happy ...) )1. T-SQL simple query, connection query(1) Using SQL statements to build a library, build a table, and

When OpenID equals the Mendian field in the current Openid,order table and the contents of the ID field in Mendian, the order table is associated Mendian with the order form, and the data in the table order is taken out., (as M and as O are the

User management mysql>use MySQL; view mysql> select Host,user,password from user ; creating mysql> Create user  zx_ Root   identified by ' xxxxx ';  //identified by will use plaintext password encryption as a hash value to store modifications

MySQL Remote access command format: MYSQL-H host address-u user name-P user PasswordFirst modify the MySQL my.cnf file on the target server (115.159.66.51):After modifying exit, restart the MySQL service command: sudo service mysql restartNow try to

Today want to download from the official website of the source package installation, how can not find the download connection, depressed ...Second step to view the source codeFortunately the website writes the Post receive way, also supports

MySQL master-Slave synchronization architecture is currently one of the most used database schemas, the Mysam engine is responsible for adding modified delete operations, the INNODB engine is responsible for querying, so-called read-write separation.

Log4j can support log output to files, databases, and even remote servers, this tutorial takes the MySQL database as an example to explain:1. Database designDatabase tablesTable 4-1 Journal table (log) Field name Field

It should be noted that the operation should remember the end of the semicolonIf you forget to enter a semicolon you can use \c to end the command inputCommon operations are the following table:1 The Mysql.exe in the bin directory under the MySQL

Does not require the effort to use the MSI file: Next, the next installation.Just get the zip file (mysql-5.6.16-win32.zip) and you can use it after decompression.1. Unzip the file, anywhere.2. Go to the Bin directory, open a CMD window, execute:

The following table shows the characteristics of the various storage engines:Two of the most common storage engines are MyISAM and InnoDBWhen I first approached MySQL, it might be a little surprised to have a storage engine that doesn't support

1.MySQL JOIN operationThe left join is based on left table and its records are all represented, while the right table shows only the records that meet the search criteria. The right join is based on the table on the left, and its records are all

DemandNow there is a demand, MySQL has a table, data growth is very fast, but the data is valid for 1 months, one months ago the record is not very important, but can not be deleted. In order to ensure the query speed of this table, a simple backup

1130 ' 192.168.1.3 ' is ThisWorkaround:1。 Change the table method. It may be that your account is not allowed to log on remotely, only on localhost. This time, as long as the computer on the localhost, log in to MySQL, change"MySQL"In the database.

Data and previously learned SQL language, inserted into the database inside the statement is like thisINSERT into VALUES is of is of Col_2 ")But this kind of toss an afternoon, Leng did not succeed, also can not find the reason in where, urgent

MySQL Technology insider InnoDB Storage Engine This book has been seen for nearly 10 days or so, it should be said that the author has a relatively rich level of development, at the source level analysis of a more thorough. If you combine

　　2. Unzip the MySQL archive packageUnzip the downloaded MySQL package into a custom directory, and my unzip directory is:"D:\Program Files\mysql\mysql-5.6.13-win32"Will unzip the directory under the default file My-default.ini copy one copy,

1. Using whileDROP PROCEDURE IF EXISTS ' addstudent ';DELIMITER;;CREATE PROCEDURE ' addstudent ' (iNum int)BEGINDECLARE VI int default 0;Start transaction;while (VI INSERT into student (Id,name) VALUES (Vi,concat (' Andy ', VI));Set VI = vi+1;End

An index is a particular sort of algorithm for a particular MySQL field, such as a two-tree algorithm and a hashing algorithm, which is created by creating eigenvalues and then quickly finding them based on eigenvalues. And the most used, and is the

1. Install MySQL ODBC driver:MySQL ODBC driver can go to official website: http://dev.mysql.com/downloads/connector/odbc/5.1.htmlDownload, check the appropriate ODBC driver for this computer2. Configure ODBC LinksAfter the downloaded ODBC driver

ObjectiveIn the database is a sheet of inextricably linked tables, so the table design is good or bad, will directly affect the entire database. While designing the table, we will focus on one issue and what storage engine to use. Wait a minute,