MySQL

Official website:Dev.mysql.com/downloadsMySQL version used in the current lab environment:Mysql-5.6.29-linux-glibc2.5-x86_64.tar.gzcommands for direct wget under Linux:wget http://dev.mysql.com/get/Downloads/MySQL-5.6/mysql-5.6.29-linux-glibc2.5-x86_

AMissing library file libstdc++.so.5Yum Install libstdc*BSELinux iptablesCThere is residual data mysql-bin.indexDData Directory Permissions/data/mysql owner if MySQLE/ETC/MY.CNF not specified DataDirFThe MySQL process is stillGSkip-federated needs

principles of MySQL index design 1. The index column of the search is not necessarily the column you want to select. In other words, the column that best fits the index is the column that appears in the WHERE clause, or the column specified in the

1, Pre-order　　In order to reconstruct part of the Code of the service-side interface of the app (social class), so it touches the word innoDB, as well as the transaction, the following is mainly in the form of examples to show its usage, the theory

The MySQL UPDATE statement is simple, updating one field of multiple data with the same value, which is generally the case:UPDATE table_name SET field = ' value ' WHERE condition;To update multiple data to different values, you can:foreach ($display

Dependent modules:1. Mysql:https://github.com/felixge/node-mysqlNPM install MySQL--save2. Async:https://github.com/caolan/asyncNPM Install async--save(Ps:async module can be replaced with other promise modules such as Bluebird, Q, etc.)Because the

Zabbix Official Support Monitor MySQL, but using the default template directly is not available and requires additional settings to use. If you only need to do a simple monitoring of MySQL database, Zabbix self-brought template can meet the

Database1. Key: The primary key is the flag column in the table. A key may consist of several columns. You can use keys as a reference between tables. CustomerID is the primary key of the Customers table, which is called a foreign key when it

MySQL View database commandcommand to open a databasemysql> use MySQLDatabase changedCommands to view the databasemysql> show databases;View detailed structure of a data tableMysql> desc func;New DatabaseMysql> CREATE DATABASE School;Query OK, 1 row

Because the previous custom function was executed in the case of opening the log file, a detailed analysis of the error is as follows:1. Calling a custom functionMysql> select Sp_function_dbdh_three (); #以前自定义的函数2. Error message:ERROR 1418 (HY000):

MySQL will appear in Chinese garbled reason is the following points:The 1.server itself sets the problem, for example still staying in Latin12.table language setting problem (including character and collation)3. The connection language setting

Reprinted from Http://www.jb51.net/article/34747.htm1. Create a stored procedureBuild a MySQL stored procedure Add_proCopy CodeThe code is as follows:Delimiter//drop procedure Add_pro//CREATE PROCEDURE Add_pro (a int, b int, out sum int)BeginSet sum

The first few blogs have been published in succession to all technical details of the turntable network, as follows:Baidu Network Disk CrawlerChinese Word segmentation algorithmInvite friends to registerJS Pagination Part CodeThis blog I will

char, varchar belong to String type1, char is a fixed length, can know exactly the length of the column value, that is, how many characters. When specifying char (5), it means that only 5 characters can be saved, such as 5 English ' a ', 5 kanji ' i

1.1.1 phenomena Executes a stored procedure with the following error: Please correct the following input error : Cdbcommand cannot execute SQL Statement : sqlstate[hy000]: General error:1456 Recursive limit 0 (as set by the

public class SQLconnection {/** Name of connection database */private static String username;/** password to connect to database */private static String userpwd;/** Path to connection database */private static String URL;/*** Static initialization

MySQL installation method, mysql Installation Method For Mysql on all platforms: Download MySQL. select what you needMySQL Community ServerVersion and corresponding platform.  Install Mysql on Linux/UNIX On Linux, we recommend that you use the RPM

MYSQ Development notes-MYSQL basic enhancement (Mysql basic statements), mysq-mysqlBasic MYSQL enhancement library operations 1 create a database using the UTF-8 character set: 2 create database mydb character set UTF8; 3 4 create a database with a

MySQL NoInstall configuration, mysqlnoinstall 1. Download mysql-mysql-5.1.55-win32.zip 2. decompress the package to any directory. The directory name should not contain spaces;Example: C: \ mysql 3. Delete the four directories Embedded, include,

SQL statement and database optimization, SQL statement database Optimization1. Unified SQL statement writing For the following two SQL statements, the programmer thinks they are the same and the database query optimizer thinks they are different.