MySQL

The test environment is win7, office 2010, and MySQL 5.5.42.   Step 1: Select the data block to be imported. an additional column is required.   Step 2: Copy the selected data block to a new Excel worksheet and save it as a text file

MySQLInstall configurations 1.Download mysql5.5.18 Green Edition and MySQL Official Website: mysql.com. 2.Decompress the package to the Directory D: \ mysql5.5.18. 3.Add MySQL to the environment variable path: ; D: \ mysql5.5.18 \ bin 4.

After you reinstall the system, you don't need to reinstall mysql. You just need to add the MySQL service to the System Service. The specific steps are as follows: Install MySQL Service   Create and edit a BAT file with the following content,

Recently, due to the increase in database read requests, there was a serious read/write lock problem. Due to Master/Slave separation, the master server quickly completed the write operation, however, a large number of select queries in the slave

In daily work, for MySQL master-slave ReplicationCheck: on the one hand, we need to ensure that the overall structure of the replication is normal, and on the other hand, we need to check whether the Master/Slave Data is consistent. For the former,

This article introduces six useful MySQL SQL statements. Many may use PHP to implement these functions. 1. Calculate the number of years You figured out how old this person is on your birthday. Select date_format (from_days (to_days (now ()-to_

Alter table: add, modify, and delete table columns, constraints, and other table definitions. View column: DESC table name; Alter table t_book Rename to BBB; Add column: alter table table name Add column name varchar (30 ); Delete column:

Import Java. SQL. connection; import Java. SQL. drivermanager; import Java. SQL. preparedstatement; import Java. SQL. resultset;/*** JDBC connection to MySQL database ** @ author zhanqi **/public class MySQL {Private Static string driver = "com.

Port the database previously connected to sqlserver to MySQL. The inserted Chinese data is garbled. Find a solution for surfing the internet, 1. Change the connection string "JDBC: mysql: // localhost: 3306/JD? Useunicode = true & amp;

The most frequently asked question is about MySQL database performance optimization, so I plan to writeMySQL database performance optimizationIn this article, I hope to help MySQL DBAs at the early stage and other friends who are interested in MySQL

Next to the previous articleMySQL database performance optimization-SQL Optimization, This isMySQL database performance optimization topicsThe fifth article in the series:MySQL database performance optimization-storage engine Selection The MySQL

This is the fotolog experience. It is said that fotolog has deployed 51 memcached instances on 21 servers and cached up to GB of content on 21 servers, this number is much larger than that of databases on many websites. The original Article is a

Start: Net start MySQL;Enter: mysql-u root-P/MySQL-H localhost-u root-P databasename;List databases: Show databases;Select Database: Use databasename;List tables: show tables;Show columns from tablename;Create a database: Source

Method: Add explain before a general SQL statement;Meaning of analysis results:1) Table: The table name;2) Type: Connection type (all/range/Ref ). Among them, ref is the most ideal;3) possible_keys: query the available index names;4) Key: actually

InnoDB and MyISAM are the two most commonly used table types in MySQL, each with its own advantages and disadvantages, depending on the specific application.The basic difference is that the MyISAM type does not support advanced processing such as

Use the mysqlbinlog command to restore the database. BINLOG backs up data by recording binary files, and then restores data from the binary file to a certain time period or operation point. 1: Enable BINLOG Logging Modify the MySQL configuration

For the use of the mysqlbinlog tool, you can refer to the MySQL help manual. It has detailed usage, In this example, the focus is on the use of the -- start-position parameter and -- stop-position parameter.   · -- Start-position = N   Read from the

Environment: Debian 6.02 (squeeze) x64 Software: MySQL 5.5.14 Steps: 1. upgrade the system 1 #apt-get update 2   3 #apt-get upgrade 4   5 #apt-get install chkconfig

1. MySQL remote connection commands can be used to remotely import and export dataMysqldump -- default-character-set = gb2312-hsf-0000000.00-uroot-pxxxxxx mydatabase> D: \ data. SQLExport the specified database to an external SQL file!Restore

Mysql> Create Table jackbillow (IP int unsigned, name char (1 ));Query OK, 0 rows affected (0.02 Sec)   Mysql> insert into jackbillow values (inet_aton ('192. 168.1.200 '), 'A'), (inet_aton ('192. 100.30.241'), 'B ');Query OK, 2 rows affected (0.00