MySQL

A few days ago I tried to write a JSP website, but I wrote it using elcips. ProgramIt is always garbled, and all Chinese characters in the MySQL database are? I checked a lot of solutions online, but they didn't work very well. Finally, I found a

I. database backup and recovery policies A) Directly copy the object Directly copy the/usr/share/TSMIS/MySQL/test folder to another place. Mysqlhotcopy db_name/path/to/Some/Dir Only suitable for MyISAM tables. In fact, it is used to copy

In MySQL, when the delete operation drops tens of millions of data records, the table may be locked, and the MySQL server may be under great pressure. This is an unavoidable problem in MySQL. It can be said that it is insufficient in dealing with

Recently, I picked up MySQL again in the development project and encountered Chinese garbled characters when setting up the environment. I will share with you the solution below. 1. Show variables like 'character _ % '; shows all settings. Set the

The specific error is as follows: Table '. \ tablename \ posts' is marked as crashed and shoshould be retried red It indicates that the post table posts of the Forum is marked with an error and needs to be fixed. I remember a similar problem

Select * FromTablename limit pagesize*Pageno, pagesize # MySQL database page, which can automatically calculate the deletion records # pagesize*Pageno refers to the number of records that deviate from the first record in the record set. Okay, I

Stored Procedure syntaxCreate procedure proc_name ([in | Out | inout] Param data type)BeginStatementEndIn the MySQL command line, each statement must be separated by a semicolon (semicolon), which is the execution point of MySQL. In order to write

// Go to the MySQL built-in Management Library: information_schema // Your own database: dbwww58com_kuchecarlib // Your own table: t_carmodelparamvalue MySQL > Use Information_schema; Database Changed MySQL > Select Data_length, index_

MySQLLock Mechanism of common storage engines MyISAMAndMemoryTable-Level Lock (Table-level locking) BdbUse the page lock (Page-Leve locking) Or table-Level Lock. The default value is page lock. InnoDBSupports row-level locks (Row-level locking)

MySQL Log File MySQL has different types of log files (each storing different types of logs), from which you can query what MySQL has done and manage MySQL, these log files are indispensable.1. The error log records the error information during

Install the compilation tool Yum install GCC gcc-C ++ Yum install ncurses-devel Download source code Mkdir-P/tmp CD/tmp Wget http://dev.mysql.com/get/Downloads/MySQL-5.5/mysql-5.5.15.tar.gz/from/http://mysql.he.net/

Detailed description of mysqlreport To optimize the configuration of MySQL, you must first identify the performance bottleneck of MySQL. The report output by show status is the reference data used to calculate the performance bottleneck.

1. Create a user. // Log on to MySQL @> Mysql-u root-P @> Password // Create a user Mysql> insert into mysql. User (host, user, password, ssl_cipher, x509_issuer, x509_sub Ject) values ("localhost", "pppadmin", password ("passwd "),'','',''); In

1. Stored Procedure name. SQL Use test; drop procedure if exists deleteconfigifdelcamera; delimiter // create procedure deleteconfigifdelcamera (in cameraid integer) Begin declare camera_id integer; select ID into camera_id from camera where id =

1. Connect to MySQL. 1. Connect to MySQL on the remote host. Mysql-h110.110.110.110-uroot-pabcd123 2. Exit MySQL command: exit (Press ENTER) II.Display operation 1. display the data table structure: Mysql>Describe table; 2. database

When backing up a database, the data table may have such a value array ('A' = 'B ', 'C' = 'D ') Value in this format. During data export, the newline is replaced with \ n (in windows, Unix may be another symbol ). When you reply to data, if you

Http://16hot.blog.isyi.com/post/1/144 Search for some materials online and follow the prompts above. The problem has been solved. Because I am using Dev-C ++ development tools. It uses the GCC compiler. The windows for C Connection Library

Http://www.oklinux.cn/html/ SQL /other/20080812/59369.html It is said that MySQL performance is very good. Prepare to test it. If the effect is good, replace the database with MySQL. But I didn't expect it to take two hours! But now we have solved

3. Add users: (Note: Unlike the above, the following commands in the MySQL environment are followed by a semicolon as the command Terminator) Format: grant select on database. * To username @ login host identified by "password"   First: Add a

Four features of transactions 1. atomicity refers to the fact that the entire database transaction is an inseparable unit of work. 2. Consistency: A transaction changes a database from one State to the following consistent state. The integrity