MySQL

Component V1.7 version adds support for MySQL (Test MySQL 5.1 version). The following shows how to use the. First add connectionstring public static Dbsession mysqltest = new Dbsession ("mysqlconnectionstring"); A new table mtable is created

The best way to understand indexes is to combine examples and then analyze an example. Suppose you want to design an online dating site with many columns, including country, region, city, sex, eye color, and so on. The Web site must support a

A clustered index is not a separate index type, but rather a way of storing data. The InnoDB clustered index actually holds the B-tree index and data row information in the same structure. Because data rows cannot be stored in two different places,

Being a DBA requires a rigorous working attitude. Two test DB server A, server B, default storage engine InnoDB. There is a need to synchronize all the table structures in a to B. It was done at the time: Mysqldump-no-data ... After exporting the

Work in the case of SQL optimization, often have such a problem, SQL has all the use of the index, the requested amount of data is small, the total amount of data is not large, there are still many slow query appearance (we stipulate is >20ms). This

This example all involved the file download address http://pan.baidu.com/share/link?shareid=1325829979&uk=2065228996 Step one: Build a database Suppose you have a SQL file Mysql>use dbname; Create a database with a database named dbname (empty

MySQL single machine Multiple instance scenario, refers to running multiple MySQL database instances on a single physical server. The advantages of MySQL single machine multi-instance: 1, save the cost, reduce the number of servers, IP, cabinets,

The following on the author of the work encountered in the time problem, simulate the situation to everyone to introduce. The job is still a massive amount of data. About hundreds of millions of records a year. And the data is more time-sensitive.

The mainstream UNIX system now has two styles: System V and BSD, and they differ as follows: Linux as a class Unix, there are also these two styles, where CentOS belongs to System V, this article mainly describes how to start and shut down MySQL

In the previous article, we have learned how to install MySQL data, then how do we manage and use MySQL? MySQL is a set of database management system, in each MySQL server, support run to the library, each library is equivalent to a container, where

This article is summed up from the work of the author. Because the time problem and the consideration cannot be comprehensive enough, so this article will be completed for a long time, the following will give the content, share ^_^ Under Windows,

The practical application of my work. When collecting data, it is not necessary to repeat it after collection. At the same time, multiple instances are required to operate simultaneously to ensure the continuity of data acquisition. So summed up,

This article applies to newly installed primary and standby libraries, assuming that the primary repository is empty, and if you are copying from an existing master library, go to [MySQL] Replication (3)-Create a master copy (start copying from

Replicated schemas The basic problem with MySQL replication is to keep the data of one server synchronized with other servers, which has the following characteristics: 1) Asynchronous: This means that data from the repository at the same point in

The metadata is "data about data." Any data that describes the database--as opposed to the content of the database--is meta data. As a result, most of the strings in the column name, database name, user name, version name, and results from the show

These things are the operational logs of the database mysql-bin.000001 mysql-bin.000002 mysql-bin.000003 Wait a lot of AH ~ ~ ~ More than 200 MB of my MySQL total database add up to less than 50MB These can be cleaned out. Under cmd under MySQL

Starting a remote service with the root user has been a security taboo because remote attackers are most likely to gain full control of the host if there is a problem with the service program. MySQL made a small change at the start of version 3.23.15

This article briefly describes the four options that affect mysqld security. --secure The IP numbers returned by the gethostbyname () system call are checked to ensure they are parsed back to the original hostname. This makes it harder for some

The MySQL plug-in storage engine is a component in the MySQL database server that performs actual data I/O operations for the database and allows and enforces a specific set of attributes for special application requirements. One of the main

Q: How to solve the MySQL 5.0.16 garbled problem? A: MySQL 5.0.16 garbled problem can be solved in the following way: 1 Setting phpMyAdmin Language:chinese Simplified (zh-utf-8) MySQL Character Set: UTF-8 Unicode (UTF8) MySQL Connection