MySQL-- database CRUD operations

CRUD operation and use of the database

• C (Create): Creating

1. Create a database: create database database name;
2. Create a database to determine whether there is another: create database if not exists Database name;

3. Create a database and specify the character set: create database database name of the character set the character set;

4. Integrated: Create database S3, determines whether there is, and specifies the character set to GBK
Create character database iF Not eXISTS S3 sET GBK;

• R (Retriev): inquiry

1. All queries the database name: Show Databases;
2. query a database character set (see Creating a database statement): show create database database name;

• U (Update): Modify

1. Modify the character set of the database: alter database database name of the character set the character set names;

• D (Delete): Delete (very dangerous not recommended.)

1. Delete the database: drop database database name;

2. determine the database exists, there is then deleted: drop database if exists database name;

• Using a database (the database can be seen as a folder inside the structure seen in Table folder contents in storage)

1. query the database currently in use: the SELECT Database ();
2. Use Database (equivalent access to the database (into the folder)): use database name;