MySQL

1---------------Create a table------------------------------------drop table if exists tables nameCREATE TABLE table name (ID int (one) primary key auto_increment, name varchar () not NULL); 2---------------Modify the table name of a table-----------

Initial environment:CREATE TABLE product (id int UNSIGNED NOT NULL auto_increment, amount INT UNSIGNED DEFAULT NULL, PRIMARY KEY (ID)) EN Gine = InnoDB CHARSET = ' utf8 '; INSERT into product VALUES (1,100), (2,200), (3,300), (4,400); SELECT * from

Experiment five Data UpdateFirst, the purpose of the experimentMaster the use of data update operations.Second, the experimental environmentIii. Examples of experiments1. Insert a tuple into the basic table SC.①insert into S (s#,sname,age,sex)VALUES

experiment four nested queriesFirst, the purpose of the experimentMaster the nested use of SELECT statements, implement complex queries on tables, and further understand the advanced use of SELECT statements.Second, the experimental environmentIii.

Experiment three connection queryExperiment Name: Connection query (2 hours)First, the purpose of the experimentUnderstand the operation and basic usage of join statement, master the concept and use of inner connection, outer connection,

experiment two single-table queryFirst, the purpose of the experimentUnderstand the operation and basic usage of the SELECT statement.Second, the experimental environmentis a Chinese client for MS SQL SERVER 2005.Iii. Examples of experiments1. All

1. Unzip MySQL server to D driveConfiguring Environment variablesMysql_home D:\J2EE\apache-ant-1.9.7PATH%mysql_home%\bin;2. Modify the MySQL boot configuration fileMy-default.iniNote Copy the backup and then modifyBasedir =

First, the integral typeEach of the integers has both unsigned (unsigned) and signed (signed) types. MySQL data type Meaning tinyint (m) 1-byte representation: Signed ( -128~127); unsigned (0~255)

MyISAM　1. FeaturesTransaction not supported: The MyISAM storage engine does not support transactions, so business scenarios that are required for transactions cannot be usedTable-level locking: The locking mechanism is a table-level index, which can

The last mention of using the thinkphp framework to achieve the database read and write separation, now to briefly talk about MySQL master-slave replication.Form A master one from (i.e. the form to be implemented here) Primary master

First, the SOFTWARE environmentThe Python environment has sqlite3 installed by default, and if you need to use sqlite3 we can import the module directly at the top of the Python code module using the import sqlite3. This article I was documenting

Recently in the entry Nodejs, just learned how to use the Nodejs database connection, feel more important, then write essays, simply recordAfter installing node, we can use the NPM command to install the MySQL module in Nodejs in the root directory

One, connect MySQLThere are two ways of logging in to MySQL: Remote host: Mysql-h host address-u user name-p password-p port number Native: mysql-h host address-u user name-p password-p port number If the port number is 3306 (the default

Installation methodHttp://dev.mysql.com/doc/refman/5.6/en/binary-installation.htmlShell>groupadd mysqlShell>useradd -r -g mysql -s /bin/false mysqlShell>cd /usr/localShell>tar zxvf /path/to/mysql-VERSION-OS.tar.gzShell>ln -s

#!/usr/bin/env python# -*- coding: utf-8 -*-import mysqldbimport osimport  sysimport timecurrentdate=time.strftime ('%y%m%d ', Time.localtime ()) Def getconn (Host,user, Password,port):     conn=mysqldb.connect

MySQL Download and configuration processAfter the configuration is complete, the net start MySQL when starting the MySQL service, there are 3534 errors:The service has not been report a error.More help are available by typing NET helpmsg 3534.This

NOTE: The SQL statement in the MySQL database is terminated by default with ";". Enter the command, the keyword can be uppercase or lowercase, but must be consistent, I prefer to use lowercase, personal habits bar.There are three main ways of

MySQL Installation deployment1. Installation OverviewMySQL has several different product lines, and each product line has a lot of different versions, here Select the most widely used community version of the MySQL5.5 series as the LNMP's composite

Nodejs connects to mysql and performs simple addition, deletion, query, and modification. nodejsmysql I recently learned how to use nodejs to connect to a database. I think it is very important. I just wrote the article and simply recorded it. After

How to Use tcpdump to capture mysql packets and use tcpdumpmysql The command is as follows: Tcpdump-s 0-l-w-dst 192.168.244.10 and port 3306-I eno16777736 | strings -I indicates the network interface of the listener. in RHEL 7, the network