MySQL

Create a stored procedureDROP FUNCTION ' getsubagent ';CREATE FUNCTION ' getsubagent ' (Agentid INT)RETURNS VARCHAR (4000)BEGINDECLARE stemp VARCHAR (4000);DECLARE stempchd VARCHAR (4000);SET stemp = 0;SET stempchd = cast (Agentid as Char);While

what is the storage engine? Mysqldata is stored in a file using a variety of different technologies(or Memory)the. Each of these technologies uses different storage mechanisms, indexing techniques, locking levels, and ultimately offers a wide range

How to start/stop/restart MySQLFirst, the starting mode1. Start with service: Service mysqld start2. Start with mysqld script:/etc/inint.d/mysqld start3. Use Safe_mysqld to start:safe_mysqld&Second, stop1. Start with service: Service mysqld stop2.

Recently to the new on-line project to build a master-slave structure, so organize some useful things out, for record:One. MySQL's master-slave replication scenario:MySQL master-slave replication facilitates the robustness of database structures,

The integration of SOLR and MySQL databases enables the creation of full-scale indexes and incremental indexes.The rationale is simple: Register SOLR's Dataimporthandler in the SOLR project and configure the MySQL data source and the data query SQL

ErrorHttp://www.phperz.com/article/14/1208/39937.htmlI. PreparationTest software mysql-5.5.36System version CentOS release 6.5 (Final) 64bit----------------------------------------------------------------------------------| instance | Port |data

in MySQL data table, use MyISAM engine faster, storage space is smaller; InnoDB engine insertion speed is slightly faster, the key is to support transactions. Is it good to use MyISAM or InnoDB in practical applications? Specific problem specific

Use PowerDesigner Build database tables. Have been very busy, no time to write things. It's going to be a little bit loud this time, hey . This skill is an essential skill for project managers. the protagonist of this time: 1. establish a project

3 ways to resolve MySQL master-slave database out of syncToday, MySQL's master and slave databases are not synchronized.first on the master library：Mysql>show processlist; See if the next process is too much sleep. Found to be normal.Show master

http://www.v2ex.com/t/137724If you want your website or App to support Emoji, there are some details you need to know when setting up MySQL for the first time.EmojiThe special point of the Emoji character is that it takes 4 bytes to store it. This

Business BackgroundThe MySQL data table yhd_categ_prior structure is as follows:--Table "Yhd_categ_prior" DDLCREATE TABLE ' Yhd_categ_prior '(' category_id ' int( One) not NULLCOMMENT' Category ID ',' Category_name '

1 Create a poll table to record data for a single poll userFields include id[autoincreace], IP, time, IID (option for user selection, int type)Write the complete SQL statement for CREATE TABLE above drop table if exists poll;CREATE TABLE poll(ID int

The system adds a hard disk, mounts the new partition to the/data directory, and the MySQL data file directory is/var/lib/mysql1. Stop MySQL Service[[Email protected]~]# service MySQL StopShuttingdown MySQL ... success![[Email protected]~]#2. Move

1. What is a transactionA transaction is a combination of one or more database operation statements with acid,4 characteristics.Atomicity: Either all succeeds or all is undoneIsolation: Transactions are independent from one another and are not

1: Creating Tables and stored proceduresmysql> CREATE DATABASE Trx; Query OK, 1 row affected (0.02 sec) mysql> use trxdatabase changedmysql> CREATE TABLE test_trx ( ID int (5), C1/>-> uname char (()), engine =innodb; Query OK, 0 rows affected (

Objective: To test the garbled problem of backup and recovery of single MySQL instance in multi-character set database environmentPreparatory work:create DATABASE ' utf8_db '/*!40100 DEFAULT CHARACTER SET UTF8 */; create DATABASE ' latin_db '/*!4010

First, the insertion of dataInsert columns into a table sequentially (this is commonly used): INSERT into Table name values (Value1,value2,value3,........)Insert for a specific column: INSERT into table name (COLUMN1,COLUMN3) VALUES (value

Original: http://database.51cto.com/art/201011/233234.htmMySQL single-column index is what we often see in MySQL database, the difference between MySQL single-column index and composite index may be a lot of people do not know very well, the

1, configure the firewall, open 80 ports, 3306 portsVi/etc/sysconfig/iptables-A input-m state--state new-m tcp-p TCP--dport 80-j ACCEPT-A input-m state--state new-m tcp-p TCP--dport 3306-j ACCEPT: wq! #保存退出 the firewall configuration file after the

MySQL version: 5.1\5.51, first check whether the MySQL service is started, if it has been started to stop the service, can be run in the Start menu, using the command:net stop MySQLOpen the first cmd window, switch to the MySQL bin directory, and