MySQL

First, the Environment preparationThe first must be the configuration development environment, which is not described in detail here for the time being.The required environment is jdk1.7,myeclipse,svn,ant, as well as the two plugins under MyEclipse

1. Follow the prompts to install the MYSQL2. Run cmd into the MySQL installation directory, my installation directory C:\Program files\mysql\mysql Server 5.6\bin input CD C:\Program files\ Mysql\mysql Server 5.6\bin3. Using mysqld to register

Problem: MySQL can only connect with localhost or 127.0.0.1FIX: After MySQL installs, the default is root user, root user can only log on the server, need to assign new user.1. Log in to the MySQL database as the root user.2. Execute a command to

The source code is as follows: Import java.sql.*; public class Contomysql {public static void Main (string[] args) {Here "Liuyan" is a test database built under MySQL.3306 is the default port for MySQL database serviceString url=

The basic steps are: (Not very accurate, please read this article)1.from2.join on3.where4.group by5.having6.order by7.select8.distinct, Sum,...9.limitJoin table must have an index or the Cartesian product.INNER JOIN's SpecialCorrectly speaking,

Basically solved by index.Usually the index key is in where, group by, and order by related columnsOnly one index can be used for a table (when querying)So it's best to use a federated index when you want to execute a complex query, which is index

After using JMeter to connect to the database, you can construct a request for database pruning in JMeter to test the database, following the MySQL database as an example to demonstrate the steps of JMeter connection to MySQL and process query

The execution plan for the fur MySQL optimizer is not accurate at all times, not optimal (Cpu+io)???There are too many factors:The existence of INFORMATION_SCHEMA information is regularly refreshed, many times is not the most true, or even big

Install Mysql-essential-5.1.36-win32.msi (2009), too lazy to download new.During installation, the previously installed phpedit constituted interference, and its license expired and could not be found. Uninstall Phpedit, reinstall, result start

The MySQL client is on the DOS interface, but the default character set encoding for the DOS interface is: GBK(1). MySQL character conversion schematic diagram(2). View all of the server's encoding methods:>show variables like ' character% ';(3).

If you can connect to MySQL locally, why can't I connect to MySQL remotely? This is because the default installation of MySQL, for security reasons, can only be locally connected. If you need to connect remotely, you need to set up MySQL's

Alas, recently rushed a trendy, with the Python3.4 and Django1.6, the database is still the Internet Enterprise common MySQL.Sad reminder is in Python2.7 ERA connection MySQL MYSQLDB also not support Python3.4, fortunately, hard to ask G brother

Select fdate,fminute,ftotal,ft200, (ft200+0.0)/ftotal from t_switch_155 ORDER by FDate asc,fminute ASC to outfile ' 15 5.txt ';Then open with Notepad, you can see the whole. If you open with txt, a newline character may not exist.If TXT has a string

1.Execute the following sentence successfully in MySQL, can be added in Chinese. Insert into book (bookname,author,publish) VALUES (' Good ', ' Hao ', ' Hao ');However, executing this INSERT statement in the JSP will cause garbled

There are quite a few libraries connected to MySQL on Python 2.x, the more famous of which is MySQLdb (the Django project uses it; I also used it when developing test systems), see: http://sourceforge.net/projects/mysql-python/However, at present

Recently drop database pai; ErrorError 1010 (HY000): Error dropping database (can ' t rmdir './pai ', errno:39)I just want to remove the library file and try it, soRm-rf/usr/local/mysql/data/paithen I show databases;And then there's the PAI

1. Permissions issues2. Some commands related to stored proceduresShow procedure status\g see what stored procedures are in the database Show procedure statuswheredb ='db_name'\g view which stored procedures are in the specified database

Record the Linux installation MySQL process and the problem resolution.1. Install MySQL using yumYou can use the MySQL command before installing to see if MySQL is installed.# yum Install-y mysql-server2. Start and close the MySQL service# Service

Example of input and output parameters of mysql Stored Procedure drop PROCEDURE if exists my_procedure; create PROCEDURE my_procedure(in my_id int,out my_name char) BEGIN select list_name into my_name from aa_list where list_id=my_id; end; call my_

How to solve the problem of MySQL Workbench gnome-keyring-daemon, mysqlworkbench A MySQL Workbench is installed under Fedora to run and connect to the database. The gnome-keyring-daemon error occurs during Store in Keychain. If the password cannot