Basic operation of the database

The basic operation of the database and tables: Task II

Basics 2.1 database

1. Create a database

Creating a database is partitioned space to store data in a database system, MySQL, create a database of basic syntax is as follows:

                  CREATE DATABASE database name;

For example: Create a name for zmy the database, SQL statement is as follows:

                  CREATE DATABASE zmy；

2. Check database

In order to verify that the database system to create a name for zmy database, we need to look at the database in MySQL, view the database SQL statement is as follows:

                （ 1 ）  SHOW DATABASES；

                 (2)     SHOW the CREATE DATABASE database name;

For example: View the name zmy database, SQL statement is as follows: 

                  SHOW CREATE DATABASE zmy；

3. Modify the database

If you want to change the database code, the basic format of the statement is as follows:

             ALTER DATABASE database name DEFAULT CHARACTER SET COLLATE encoding encoding _bin;

Note: The "encoding" refers to the database encoding modified. 

For example: the database zmy encoding modified to utf8, SQL statement is as follows:

             ALTER DATABASE zmy DEFAULT CHARACTER SET utf8 COLLATE utf8_bin;

4. Delete database

Delete to delete the database is a database system already exists in the database, delete the database basic statement format is as follows:

                               DROP DATABASE database name;

Note: After successfully delete the database, all data in the database will be cleared, the original space allocated will also be recycled .

For example: delete the name zmy the database, SQL statement is as follows:

                 DROP DATABASE zmy；