MySQL

In the Linux world enjoys a high reputation of the MySQL database, with its small, powerful, full free and famous. However, for many users, it is sometimes necessary to browse and analyze the data in Windows, while under Windows, MySQL database

In MySQL, the definition time of the slow query is specified by the mysql built-in parameter variable long_query_time, its default value is 10 (in seconds), we can show variables like ' long_query_time '; Directive to view the information for this

The statement is simple The code is as follows Copy Code $connection =mysql_connect ("localhost", "root", "password"); Connect and select a database servermysql_select_db ("Test", $connection);$query = "SELECT * from

MySQL master-slave replication in general, we will set the database that needs to be synchronized, using the parameter configuration option, BINLOG-DO-DB, you can specify the database to be synchronized on master, and replicate-do-db specify the

If it's myisam. Just change the name of the library name folder under the data directory OKIf it's innodb. It is not possible to modify the name of the library. Rename database or ALTER DATABASE is not a good place to be on the Internet blind 咧咧.

1. Copy table structure and data to new table CREATE Table New Table SELECT * from old tableThis method copies all the contents of the oldtable, and of course we can delete them with the delete from newtable. But one of the worst aspects of this

DROP TABLE IF EXISTS ' Pcms_channel '; CREATE TABLE IF not EXISTS ' Pcms_channel ' ( ' CID ' tinyint (3) unsigned not NULL auto_increment, ' Name ' char ' not NULL COMMENT ' channel name ', ' ParentID ' tinyint (4) not NULL COMMENT ' parent id ',

Company all servers finally put to the same room, opened the intranet access. This way, you have to change the configuration of some MySQL from the server and become intranet access. BackupThe first is to shut down the MySQL server (slave end) and

MySQL group BY, sorting the largest record of time in each record Here is the test table, which tests the SQL CREATE TABLE IF not EXISTS ' test ' (' ID ' int (a) unsigned not NULL auto_increment,' Install ' int (a) unsigned not NULL,' Day ' int (a)

MySQL Database connection class/******************************** PHP MySQL Connect* Author:ray* DATE:2005/07/30* UPDATA:2005/10/23* version:0.1*//* Determine if the parameters required to connect to the database exist.if (empty ($dbhost)){$error = "

Analysis reason one: MySQL's automatic backup function may cause the database to shut down the service before the backup, but when this starts the server does not respond, Start-run-services.msc, open Windows service to find MySQL services and

The (join) connections that are planned in the SQL standard are broadly grouped into the following four categories: 1. INNER JOIN: A join of a recordset that conforms to those records in which the join relationship exists in the two tables. 2.

1.1 Get Current date + time (date + times) function: Now () Mysql> Select Now (); +---------------------+| Now () |+---------------------+| 2008-08-08 22:20:46 |+---------------------+ In addition to the now () function to get the current date

You can prevent duplicate records from being inserted by using EXISTS conditional sentences. Example one: inserting more than one record Suppose you have a clients table with a primary key of client_id, you can use the following statement: Code:

Problem Analysis: 1, c:windowstemp folder permissions are not enough, at least to give the USERS group readable and writable permission; 2, C:windowstemp folder full of disk, the file is not written in, empty the TEMP folder; 3, third party

The development of the Web site backend system in the test process, this problem occurs:Invalid query:duplicate entry ' 127′for key 1SQL is:insert into ' kq_news ' (' Title ', ' Author ', ' Type ', ' Content ', ' Isdel ', ' adate ', ' Range ', '

MySQL Tutorial master-slave sync failure last_io_error:got fatal Error 1236 from master solution Encountered such errors as: "Last_io_error:got fatal error 1236 from master when reading the data from binary log: ' Could ' is not find ' e name in

When connecting to the database tutorial show can ' t connect to MySQL Server (10060), Basic can follow the following ideas for troubleshooting: 1. The network is impassability. Check to be able to ping. 2. Firewall settings. Whether the

MySQL Tutorial triggers database tutorial Synchronizing data methods Database nameDriver table The table being triggered/***-------------------Documentation Comments------------------------------------------* The author * tatsu *qq 85089479*email

MySQL tutorial cursor cursor definition DECLARE cursor_name cursor for select_statement; Cursor operations Open cursor OPEN cursor_name; Fetch gets the record of the cursor's current pointer and passes it to the specified list of variables,