drop database if exists

Mysql reorganizes notes -- woods memo, mysql -- woods================================ SQL memo CRUD queries multi-table events and so on ==== ==================================Example 1. database 1. create database [if not exists] db_name [character

Use commands to create a MySQL databaseHttp://www.sudu.cn/service/detail.php? Id = 11443 # 6d 1. Connect to MySQL Format: mysql-H host address-u user name-P User Password 1. Connect to MySQL on the local machine. First, open the DOS window,

1. Connect to MySQL. Format: mysql-H host address-u user name-P User Password 1. Example 1: connect to MySQL on the local machine. First, open the DOS window, enter the directory mysqlbin, then type the command mysql-uroot-P, and press enter

Readers who frequently access the Internet may encounter this situation: when accessing some resources of some websites, a dialog box pops up in the browser asking users and passwords to access resources. This is a technology used for user

I. MySQL connection format: Mysql-H host address -U User Name -P User Password 1. Example 1: connect to MySQL on the local machine: First, open the DOS window, enter the directory mysqlbin, then type the command mysql-uroot-P, and press enter to

drop database if exists SS;create database SS;use SS;create table Student ( Sno char(9) primary key, Sname char(20) unique, Ssex char(2), Sage smallint, Sdept char(20));create table Course( Cno char(4) primary key, Cname char(40), Cpno char(4)

Mysql drop database delete database command instance description, drop instance description The mysql drop database Command is used to delete a database. If you try to use the drop database Command to delete a database that does not exist, you will

MySQL databases can be said to be one of the most common and common databases for DBAs. The wide application of MySQL also adds more people to the ranks of them. The following are some of the most common and frequently used MySQL Databases

Message Display page: added the paging and message reply functions compared to the previous example. Main Code:Install/index. php: Program Installation page Copy codeThe Code is as follows: If ($ _ GET ["action"]! = 1) { ?> MySQL Host Name:

Mysql common command Collection [absolute essence] bitsCN.com 1. connect to MYSQL. Format: mysql-h host address-u user name-p user password 1. connect to MYSQL on the local machine. First open the DOS window, then enter the directory mysql/bin,

Mysql review and learning (2) bitsCN.com Mysql-h localhost-uroot-p123456 // connect to the database Show databases; // view the database Create database if not exists db_goods; // create a database Use db_goods; // use the database Show tables;

Mysql review and learning (2) database and table structure creation and deletion bitsCN.com Mysql-h localhost-uroot-p123456 // connect to the database Show databases; // view the database Create database if not exists db_goods; // create a

After application deployment, users start to input data, worry about the application is not stable, so every day after the user input data, to back up the application system;Due to the design time, some files stored in the database are stored in the

The first part: User ManagementUser created: Create DATABASE XXXView User: Show DATABASES; key View User: Show DATABASES like ' de.* '   explanation: Creating a user is equivalent to creating a file in the physical directory that ends in. db,       

Php updates mysql and obtains the number of changed rows. After updating mysql, a php instance obtains the number of changed rows. in php, the mysql function is provided to obtain the number of records affected by the last query: mysql_affected_rows

This article mainly introduces thinkphp's database backup method sharing, which is very simple and practical. it is recommended that THINKPHP has no database backup method, so I wrote one myself, pdo is used for database connection and transaction

MYSQL User Guide (below ). In the previous article, we talked about logon, adding users, and changing passwords. Next, let's take a look at the database operations in MYSQL. Note: you must first log on to MYSQL. in the previous article, we talked

We register on the site, when entering the user name, the first to do no refresh verification, this article is mainly for everyone to introduce the Php+ajax registration real-time verification function, interested in the small partners can refer to

There are a lot of friends who have installed MySQL but don't know how to use it. In this article, we will learn some common MySQL commands from connecting MySQL, changing passwords, and adding users. First, connect MySQL. Format: Mysql-h Host

Install MySQL database in Linux and use C language programming to access database bitsCN.com Installing software in ubuntu is quite simple. a simple apt-get install solution can solve this problem. The only drawback compared with the source code