MySQL

1. Create tables and records for testingCREATETABLE' Product ' (' ID 'int) unsignedNotNULL auto_increment COMMENT' Product ID ',' Name 'varchar50)NotNULL COMMENT' Product name ',' Original_price 'Decimal5,2) unsignedNotNULL COMMENT' Original price ',

CREATE TABLE MyDB (ID in auto_increment primary key is not NULL,Price varchar (10),Title varchar (100),Detail varchar (500),URL varchar (50),seller_id varchar (50);LOAD DATA LOCAL INFILE ' C:\\users\\administrator\\desktop\\macdb.dat 'Into TABLE

Day01First, build the database server1. Install software that provides database servicesWhat are the database service software?Whether the software is cross-platformWhether the software is open source (open source software is not equal to free,

Definition of the storage engineDatabase storage engine is the database underlying software organization, database management System (DBMS) through the storage engine to create, delete, modify, query data. Different storage engines provide different

First make sure that GCC and MySQL are installed on the system.If it is not installed first. For CentOSYum-y Install GCCYum-y Install Mysql-serverYou must also install Mysql-develInstallation Success Detection:[Email protected] mysql]# Rpm-qa | grep

Reference and http://blog.csdn.net/xingyu0806/article/details/52080962Ifnull (EXPR1,EXPR2)If EXPR1 is not NULL, the return value of Ifnull () is expr1; Otherwise its return value is EXPR2 (numeric or string). The return value of Ifnull () is either

MySQL handles duplicate data some of the MySQL data tables may have duplicate records, in some cases we allow the existence of duplicate data, but sometimes we also need to delete these duplicate data. In this section we will show you how to prevent

#查询的基本语法SELECT * from table name;The FROM keyword is followed by a table name, indicating that the data originates from this tableThe column name in the table after the SELECT, if * * indicates that all columns in the table are displayed in the

To configure the Federated engine (function: cross-database operation), you need to mysql5.0 more than the version, the specific configuration method is as follows:1. First enter the MySQL database to see if the federated engine is installedInput

MySQL middleware before the advent, for MySQL master and slave cluster, if you want to implement its read and write separation, is generally implemented in the terminal, this brings a problem, that is, the database and program coupling is too high,

ReviewOf the many storage engines in MySQL, only InnoDB supports transactions, and all of the transaction isolation levels described here refer to the transaction isolation level under InnoDB.READ UNCOMMITTED: One transaction can read uncommitted

----------The primary database ---------from the database 192.168.1.1 192.168.1.2 First, the preparatory work1. Turn off the firewall[[Email protected] ~]# service iptables stop[Email protected] ~]# chkconfig

One, install MySQLHere is not a small part of the detailed introduction, if there is not installed can refer to the following blogHttp://www.cnblogs.com/wj-1314/p/7573242.htmlSecond, install Mysql-pythonTo enable Python to operate MySQL requires the

DjangoA Python web frameworkFlask and DjangoUwsgiA Python containerNginxA Web server can be the front end of a web containerClient--->nginx--->uwsgi (beginning port)--->web pageVirtualenv virtualenvwrapper Python Development Virtual Environment

First, mysql password hack1. In Shell Life make password change under linemysqladmin-hlocalhost-uroot-p password "123456" 2. Crack passwordA, add in config file: skip-grant-tables, restart ServiceB, Find the Mysql.user table and find the

Recently there is a synchronization problem, our data into the order of Mysql->redis, the business layer only for MySQL operation, and synchronization to Redis the operation is to use the open source drive package to write their own synchronization

Turn fromMySQL 5.7 Online Settings Replication filter-Yayun-Blog Park https://www.cnblogs.com/gomysql/p/4991197.html5.7 also GA, there are many new features, which are now available for online Setup replication filtering. But you still have to stop

/usr/local/mysql/bin/mysqldump-uroot-pxxxxx--all-databases > All.sqlMySQL prompts "-warning:skipping the data of table mysql.event when exporting the database with mysqldump. Specify the--events option explicitly. "This is because mysqldump default

MySQL database Operations (4) Table constraintsWhen you create a table or insert a column, you can constrain the value of the column, and if you insert an entry that does not meet the constraint, an error will be made and the insertion is

Detailed steps for fully uninstalling and reinstalling MySQL in win10, win10mysql I believe that you need to reinstall MySQL for various reasons. I had to replace 64-bit MySQL with 32-bit MySQL because of a problem connecting MySQL and Qt. The