MySQL

First you need to prepare a excel,ps with data: The header corresponds to the field name in the database table:　　　　　 Then "File---> Save As. csv file" If you have Chinese in your data, then you need to process the CSV

Arithmetic operators in the MySQL databaseArithmetic operators in the MySQL databaseFirst, an overview of the operators:The operator is also an important knowledge body in the MySQL database, which is very useful for manipulating data when executing

I was able to add the MySQL customization feature because a lot of students suggested it to me, so I added this feature,Next Release preview:Phpwamp next version will be integrated PHP Packager , you can generate a single EXE file PHP , double-click

First, the basic concept (quoted here http://www.laruence.com/2008/01/05/12.html)1, given a series of characters, each character is given a numeric value to represent the corresponding character, this value is the character encoding (Encoding). For

The great god says: In sql, you can use if else without casebelow to see, specifically why, did not figure out if there is a great God to know to provide the following information:MySQL can be used as an expression, or as a Process control statement

Viewed as an example: the original data is as follows:Thinking Analysis: The data has, statistics on a day's views, all views, or a fixed period of browsing volume here we will not say more, we will, then how we are the last seven days of data

First, business backgroundDue to the need to extract a large number of data from a database to the B system, the use of TOMIKOS+JTA for distributed transaction management, the system data source to switch to the data provider, the need to

A good memory is better than a random writing .... The following collection of the MySQL show in the use of skills .... If you need a friend, you can have a look.A. Show tables or show tables from database_name;//displays the names of all tables in

"Error Content": SQL error: Lost connection to MySQL server @ ' Waiting for initial communication packet ', System error:0"Wrong Generation Passes": appears when linking to MySQL."Workaround": Open My.ini, Find [mysqld] item, add a sentence after:

Three page, three kinds of list, LRU control tuning One, InnoDB buffer pool of three kinds of pages1.Free page: Pages that have never been used2,Clean page: Clear page, data page data and disk consistent3.Dirtypage: Dirty pagesSQL Execution

Turn on MySQL remote access permissionThe default MySQL user does not have remote access permission, so when the program is not on the same server as the database, we need to turn on MySQL remote access.There are two main ways to change the table

Suggested apache2.4+php5.6+mysql5.5+phpmyadmin4.4.4Reference: http://jingyan.baidu.com/article/fcb5aff797ec41edaa4a71c4.html; http://jingyan.baidu.com/article/ 4dc408488ecb82c8d946f1dc.html1. apache2.4, download link:

What is Mycat? Simple to understand as a MySQL middleware, it supports shunt, heartbeat-based automatic failover, support read and write separation, support MySQL master-slave, based on NIO management thread of high concurrency ...See official

3 minutes to resolve MySQL 1032 master-slave errorPart1: Writing at the top1032 Error----Now a lot of data in the production library, in the wrong delete from the library, the production database is not found after the update, and now the master

Mysql> Select Now (); +---------------------+| Now () |+---------------------+| 2008-08-08 22:20:46 |+---------------------+Get the current date + time (date + times) function: Sysdate ()The Sysdate () date-time function is similar to now (), except

1. Background* temporary table is session-based, only visible on current connection* When this connection (session) is closed, it will be automatically drop. * two different connections (sessions) Use the same temporary table name and do not

Note: This article turns from:http://www.cnblogs.com/smyhvae/p/4042303.htmlThe main contents of this chapter: First, foreign key Second, table connection Third, sub-query Iv. Index First, FOREIGN key: 1. What is a

Mysql master-slave replication, mysql master-slave Master-slave replication: There are two ways to start master-slave replication from MySQL5.6: Log-based (binlog); GTID-based (global transaction identifier ); 1. Log-based master-slave replication

MySQL transaction, view, index, database backup, recovery, mysql Database Backup Create database 'mybank ';/* Create a table */USE mybank;Create table 'bank '('Mermername' CHAR (10), # User Name'Currentmoney' DECIMAL (10, 2) # current balance);/*

[MySQL major series] Mysql cluster architecture, mysql cluster architecture Original article address (): [Technical Article] Mysql cluster architecture Address: http://www.cnblogs.com/aiweixiao/p/7258444.html Click follow public account  1. Main