MySQL

#MySQL存储过程 # #最简单的存储过程DROP PROCEDURE IF EXISTSSP1;CREATE PROCEDURESP1 () COMMENT'The simplest stored procedure' SELECT 1; # #调用CALL SP1 (); # #带输入参数的存储过程DROP PROCEDURE IF EXISTSSP2;CREATE PROCEDURESP2 (inchPINT) COMMENT'stored procedure with

indexing is the key to fast searching. MySQL indexing is important for the efficient operation of MySQL. Here are a few common types of MySQL indexes In a database table, indexing a field can greatly improve query speed. Suppose we create a mytable

Install the dependency package first to avoid problems during the installation processYum Install GCC gcc-c++yuminstallyuminstall ncurses- Yum Install Yuminstallperlperl-develThe above dependency package installation can also be done in one

A Environment:MariaDB [(None)]> select version ();+----------------+| Version () |+----------------+| 5.5.50-|+----------------+Two. Engineer feedback Unable to create accountThree Problem LocatorView the user table to determine if an exception

AuthorizedGrant Replication Slave on * * to [e-mail protected] identified by "123456"Login TestMysql-h 192.168.10.63-u slave-p 123456SCP All1.sql 192.168.10.64:/rootImport the database and keep it consistent with the primary serverMysql-u root-p

Check for duplicate records--Check for duplicate code1Select Count(Identity) Num,Identity fromEvent_logwhereCode='Code1' Group by Identity having Count(Identity)> 1Order byNumdescDelete duplicate recordsDELETE fromEvent_logWHERE' Code '='Code1'

The most recent project to design a daily fixed-point execution of the script, so in this mark, easy to findSet time_zone = ' "";Set GLOBAL Event_scheduler = 1;--Set the database base database that the event uses or belongs toUse nitrogenates;# If a

Query the status of the transaction submission in MySQL:Show variables like '%commit% '; You can view the current autocommit valueIts default value in the MySQL database is "on" for automatic transactions.The meaning of automatic transactions is

MySQL Default has a root user, but this user rights are too large, generally only in the management of the database when used. If you are connecting to a MySQL database in your project, it is recommended that you create a new user with a smaller

SQL constraintsConstraints are used to restrict the type of data that is joined to a table.You can specify constraints (through the CREATE TABLE statement) When you create the table, or you can (via the ALTER table statement) after the table is

First, prefaceToday the weather is very good, sunny day, the mood is also good. Summarize MySQL's frequently used statements, record them in essays, and share them in the same way. In the future, I will continue to update this essay as my own MySQL

Several aspects that affect performance: Server hardware Server System Selection of the database storage engine Database parameter Configuration Database structure design and SQL statements One, server hardware 1, CPU

Detailed steps to remotely connect to the SQL Server and convert it to MySQL: navicatmysql Preface I recently encountered a program using SQL Server in my project. I have never used this database before, so I tried to convert it to the MySQL format,

Mysql detailed isolation-level operation process (cmd), mysqlcmd Read uncommitted example operation procedure-Read uncommitted 1. Open the command lines of the two MySql Databases and check that the current table contains the same data as follows: 2

Mysql 5.7.17 winx64 installation and configuration method graphic tutorial, 5.7.17winx64 Install mysql-5.7.17-winx64.zip in Windows 1. Download A. ZIP file from the official website. 2. decompress the package to a folder, which is represented by D: \

Graph tutorial on installing and configuring mysql 5.7.17 on Mac, mysql5.7.17 1. Download MySQL Click Download on the official website to go to the following page:   Follow the steps shown in the following figure: Ii. installation and configuration

MySQL 1018 error, mysql1018 I. Error Reproduction You Can access the MySQL database but cannot read the database table. The following ERROR is returned: 1018 ERROR: ERROR 1018 (HY000): Can't read dir '. /cnapscips/'(errno: 13 ). Ii. Solutions

Download, install, and configure win10 MySQL without InstallationI. Overview I found a lot on the Internet. I found that many of them are not linux systems, but they are different from the current new version. I have done some practical work on

Mysql has a fault. The application directly breaks the connection and data is locked (production failure ). Data lock caused by direct application disconnection (production failure) This is a problem that data is locked because the application

Mysql 5.7.13 winx64 installation and configuration method graphic tutorial (win10), winx64win10 This article provides a graphic tutorial on how to install and configure winx64 in mysql 5.7.13 for your reference. The details are as