MySQL

ApacheIf using RPM package installation, the installation path should be in the/ETC/HTTPD directoryApache configuration file:/etc/httpd/conf/httpd.confApache Module Path:/usr/sbin/apachectlWeb directory:/var/www/htmlIf the source code is installed,

Scene One, data table automatic backup (Multiple tables field synchronization, etc.), using triggers. If Updatelog records all operations logs for a resource, Reslastlog logs information about the last operation of the resource. The synchronization

1. First create a user-saved form in MySQLCREATE TABLE Test_user (user_id bigint () unsigned not null auto_increment comment ' id ', user_email varchar (+) NOT NULL C Omment ' email ', user_password varchar (+) NOT null comment ' password ',

How to get better full-text search results in MySQLMany Internet applications provide full-text search functionality, and users can use a word or phrase snippet as a query item to locate matching records. In the background, these programs use the

MySQL data typeFirst, numeric typeMySQL's numeric data types can be roughly divided into two categories, one is an integer and the other is a floating-point or decimal. Many different subtypes are available for each of these categories, and each

command: show Processlist;if it is the root account, you can see the current connection for all users. If you are a normal account, you can only see the connection you are occupying. show Processlist; only the first 100 are listed, if you want to

On SQOOP2 server:MySQL JDBC Driver:CP mysql-connector-java-5.1.33/mysql-connector-java-5.1.33-bin.jar/var/lib/sqoop2/Oracle JDBC Driver:CP ojdbc6.jar/var/lib/sqoop2/Microsoft SQL Server JDBC Driver:CP

The wildcard characters in the like statement for MySQL: percent, underscore, and escape% represent random multiple characters SQL code Http://blog.csdn.net/yc7369/select * from user where username like '% Huxiao '; SELECT * from user where username

in Linux systemsLinux defaults to UTF8 encoding, and Windows is GBK encoded, so the above garbled problem occurs.Troubleshoot MySQL import and export data garbled problemThe first thing to do is to determine the encoding format of your exported data,

MySQL provides a number of functions for our development has a lot of help, below the MySQL provides some of the common functions of the collation, first, the character processing function:1.CONCAT ()Usage: string link function, link string field to

View DatabaseIt is often useful to get a list of databases on a server. Execute show databases; the command will be done. mysql> show databases; Create a database mysql> CREATE DATABASE Db_test; Query OK, 1 row Affected (0.00 sec)

The company has a project that requires frequent insertion of data into the MySQL database, and the design goal requires the ability to support an average of more than 1000 data per second. At present, the function has been realized, but a stress

There are two steps to read and write for MySQL: The first step is to Configure master-slave replication for MySQL; the second step is to use mysql-proxy as MySQL does a read-write separation. Mysqlmaster-slave replicationto ensure MySQL The

--View all character encodingsSHOW CHARACTER SET;--View the instructions for creating the database and view the encoding used by the databaseShow CREATE Database dbtest;--View Database encoding:Show variables like '%char% ';--Set the

View DatabaseIt is often useful to get a list of databases on a server. Execute show databases; the command will be done. mysql> show databases; Create a database mysql> CREATE DATABASE Db_test;Query OK, 1 row Affected (0.00

Detecting locked tables MySQL (locked by LOCK TABLE) Up vote15down votefavorite7 I would like to know whether there are an option to detect locked tables in MySQL or not. I mean locked by LOCK TABLE table WRITE/READ command?MySQL

When you use the Explain tool to view the execution plan of an SQL statement, you should be aware of the Select_type field when "DEPENDENT subquery" appears. You have fallen into the MySQL sub-query slow "pit" ... Let's look at a concrete

Problem descriptionA good Django project that uses Python manage.py runserver can work normally. However, when the project is deployed to Apache using MOD_WSGI, it cannot be connected to MySQL. Always error: "Internal Server error", check the log

The active record (activity log, AR) provides an object-oriented interface to access data in the database.an AR class is associated with a data table , each AR object corresponds to a row in the table , and the properties of the object (that is, the

Mysql remote connection Problems and Solutions Problems with mysql remote connection, 1. The database is not running. 2. The remote access permission is not enabled, and the IP address restriction is not