MySQL foundation - basic database operation

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1. Delete database DROP DATABASE Database name ;

mysql> drop database test;

That is, delete the database schema

2 . Create database create DATABASE Database name ;

mysql> create database test;

stay Windows and Linux The processing of database name and table name is different , stay Windows It doesn't distinguish between uppercase and lowercase , And in the Linux Chinese distinguishes between uppercase and lowercase

3 Create a dedicated user who operates the database

Rule of grammar ：

Create a new user and give him / her permission to operate the database GRANT ALL PRIVILEGES ON Database name .* TO [email protected] IDENTIFIED BY password

mysql> GRANT ALL PRIVILEGES ON test * TO user$localhost IDENTIFIED BY ‘12345’;

This gives users who connect to the database locally user Be able to home All permissions for all objects in the database to operate (ALL PRIVILEGES).

Permission is a measure of what users can do to the database , Detailed use CREATE（ establish ）SELECT( retrieval )UPDATE( to update )DELETE( Delete ) Such as permissions .

in addition .[test.*] part , Operate on detailed tables in the database

4 Use user Users log in to the database

mysql> -u user -p

Enter password: ******

5 Specify the database to use

Use the specified database USE Database name

mysql> use home;

6 In the use of MySQL Monitor time , Forget the specified database . Able to use SELECT Command to view the database in use today

today , Display the database used SELECT DATABASE();

mysql> select database();

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