MySQL

Whether in a small free database space or a large e-commerce website, it is necessary to reasonably design the table structure and make full use of the space. This requires us to fully understand the Common Data Types of database systems. Next I

Method and example for connecting to the MYSQL databaseMethod 1:MYSQL Connector/Net is an ADO. NET driver for MySQLThis component is a. NET access component designed for accessing the MYSQL database by using ADO. NET.After the component is installed,

Section 1 Status Quo of Database Cluster Technology Currently, the database cluster system has been successfully applied and has a wide range of applications: Oracle Oracle9 and IBM DB2. Oracle9 adopts the Shared-storage technology. DB2 chooses the

It is important to back up your database when database tables are lost or damaged. In the event of a system crash, you must be able to restore as much data as possible from your table to the State at the time of the crash. Sometimes it is the MySQL

A: this is the case.Create database testCreate table t (a int)Insert into test.. t select 1Then perform a complete backupBackup database test to disk = 'C: \ test. Bak'Insert into test .. t select 2Perform another full backupBackup database test to

FreeBSD 4.x or newer is recommended for running MySQL, because the thread package is much more integrated. To get a secure and stable system, you shoshould use only FreeBSD kernels that are marked-RELEASE. The easiest (and preferred) way to install

Supporting stored procedures is an important new feature in MySQL 5. Although some users do not want to encapsulate the stored procedures that reflect the business logic in the database, most database administrators prefer to use the stored

Case sensitivity when executing the SEARCH CommandBy default, MySQL does not distinguish uppercase and lowercase letters when performing search. When you use like 'a % 'for search, all column values starting with a or a are returned by default, you

When using MySQL, you often encounter the following common errors: 1. access prohibited 2. unable to connect to MySQL Server 3. the client does not support authentication protocols. 4. password effectiveness in interactive access mode 5. A host is

Installation Steps in Linux:We recommend that you use the RPM tool to install MySQL Databases in Linux. Currently, the MySQL rpm installation package is created on the SuSE Linux 7.3 system platform, but can also be installed on most other Linux

When you search for complex conditions, where somthing order by somefield + somefieldmysql searches the database, finds "all" matching records, and then retrieves m and n records. If you have hundreds of thousands of data records, you can search for

When publishing a query for a selected row, MySQL analyzes it to see if it can be optimized to make it faster. This article will study how the query optimization program works. For more information, see "Getting Maximum Performance from MySQL" in

It is often used in the NT environment to convert a Mysql database to a MSsql database or to a Mysql database. It is easy to use MySql ODBC. You can use MSSQL7 management tools or mysql management tools. You can also use other management tools. Here

MySQLForCOUNT (*)For example, Execute: select count (*) FROM tablename. Even for mysql with tens of millions of data, results can be returned very quickly. Run: select count (*) FROM tablename WHERE ....., Mysql query time began to rise. Online

MySQL databaseMedium, suitable for useIndexMySQL query speed can be greatly improved. But when should I use indexes? When is it not suitable? This article summarizes when the MySQL database uses indexes and when indexes are not needed. Next we will

Last time we introduced:For MySQL 5.5Detailed description of multiple partition columns. This article describes how to partition MySQL 5.5Non-integer column PartitionNext, let's take a look at this part! Non-integer column Partition Anyone who uses

Simplify the model. Assume that there are three tables: tblA, tblB, and tblC. Each table contains three columns: col1, col2, and col3. other attributes of the table are not considered. Without creating an index, we use the following statement to

Learning In the previous article, we learned how to create a database and a database table, and how to add records to a database table.How can we retrieve data from database tables? 1. Retrieve Information from a database tableIn fact, we have used

5. Other features: In the first step of development, only read-only is implemented, and a read/write version will soon be available. The current plan is to map database objects to files and directory objects. Let's take a look Example: -- 8 #

2Direct Copy of database backup and copy methods The other does not involveMysqldumpYou can back up databases and tables by directly copying database table files. TypicallyCp,TarOrCpioUtility. This example usesCp. When using a direct backup method,