After entering mysql database, we can show all available databases, also can enter any specific database, show all tables of this database etc are the basic operations of any database. That's not the part of sql but very important for working with any specific database.

Check all available databases:

show databases;

Entering any specific database:

use databasename;

Here my database name is "learn_sql" for this course.

use learn_sql;

Show all tables in database:

show tables;