MySQL

1. Log in to the database[[email protected] ~]# mysql-uroot-p-h172.16.*.* (IP of your database)2. Check to see if General_log is turned onMysql> Show variables like "general_log%";You can see that general_log is not turned on,3. Turn on

The MySQL server does not have a shared pool (I don't know what the shared pool is), so the best thing about using bound variables on MySQL is to prevent SQL injection.PHP Example:$stmt = $dbh Prepare ("SELECT * from users WHERE username=? and

There are numerous articles describing the methods of SQL injection utilization, and this article will describe a special scenario.DetailsIn a test, I ran into a SQL injection problem, there is no solution on the Internet, then the injection point

First, install MySQL1. Download MySQL installation package https://dev.mysql.com/downloads/I downloaded the Mysql-5.6.36-1.linux_glibc2.5.x86_64.rpm-bundle.tar.2. Pass the installation package to any directory on Linux3. Unzip the installation

Optimized a MySQL statement, no technical content, say the process:The pre-optimization statements are as follows, with an approximate execution time of 1-2 secondsSelect U.id, U.s_user_name,u.s_user_img, (select count (a.n_copy_count) from t_fonts

Installation in a Linux environment1 Check if you have installedsudo service MySQL start# if not installed, then prompt: mysql:unrecognized service2 Installing MySQL#安装 MySQL Server, core program sudo Install mysql-server# Installing the MySQL

Reference Blog http://blog.csdn.net/hollboy/article/details/13296601The sort of MySQL order by has encountered a problem todayThe scenario is that the sorted field is set to a varchar type, and then the sort is not in the order of the largest to the

--1. Creating an index information tableCREATE TABLE ' T_index_update ' (' table_name ' varchar (COLLATE) Gbk_bin DEFAULT NULL,' index_name ' varchar (COLLATE) Gbk_bin DEFAULT NULL,' Index_cols ' varchar (+) COLLATE gbk_bin DEFAULT NULL)

CREATE TABLE ' users ' (' id ' int (one) not NULL auto_increment,' username ' varchar (255) DEFAULT NULL,' PASSWORD ' varchar (255) DEFAULT NULL,' Name ' varchar (255) DEFAULT NULL,PRIMARY KEY (' id ')) Engine=myisam auto_increment=11 DEFAULT

1. Decompression2. Open My_default.iniChange Basedir to MySQL's extracted directoryChange DataDir to MySQL's extracted directory \data3. Changing Environment variablesAdd Mysql_home to the MySQL directory in the system variableAdd Mysql_home\bin

After completing the previous steps, install MySQL and configure environment variables for MySQL. MySQL is installed by default under C:\Program files.1) Create a new mysql_home variable and configure: C:\Program files\mysql\mysql Server

Back to CatalogConnect MySQL in. NET Frameworks EF We've passed the test, and in Dotnet core efcore to connect MySQL we need to test, and in the test process has some problems, of course, the final is solved, the following summary, Share to everyone!

The following is only a personal immature understanding, if there is a better understanding or ideas, you are welcome to harass me.1, a sentence to explain the relationship between the table and the database: table is stored in the database in this

Remote connection of MySQL database in LNMP environmentFirst, for the sake of security, LNMP environment is forbidden remote connection, he will delete the iptables inside the 3306 Port firewall ruleFirst, if it is phpmydmin to the authority to the

Because MySQL suddenly added a lot of connections, beyond the maximum number of connections set by MY.CNF, the MySQL service is inaccessible, here through the shell script to delete the sleep connection#!/bin/bash#---------------------------# author:

MySQl Development and Production Environment Index comparison, mysql Development Environment Index -- 1. Create an index information tableCreate table 't_ index_update '('Table _ name' varchar (20) COLLATE gbk_bin default null,'Index _ name' varchar

CentOS 6.9 upgrade MySQL from 5.6.36 to 5.7.18, centos5.7.18 CentOS 6.9 upgrade MySQL from 5.6.36 to 5.7.18 MySQL 5.6.36 installation: http://www.cnblogs.com/imweihao/p/7156754.html Easy to upgrade 1. Close the database safely [Root @ 001 ~] #

RHEL 5.7 uses rpm to install XtraBackup, rhelxtrabackup I encountered some problems when installing Percona Xtrabackup 2.4.6 using RPM on Red Hat Enterprise Linux Server release 5.7 (Tikanga.   [Root @ DB-Server tmp] # yum-y install perl-devel

Database optimization and database Optimization SolutionsI am looking for a job recently. During the interview, many companies will ask questions about database optimization. I will summarize the database optimization questions here today. I will

Four main storage engines of MySQL and four engines of mysql A table is stored in a database that is closely related to each other. Therefore, the design of a table directly affects the entire database. When designing a table, we will focus on the