After using the client to connect to MySQL, use use keyword selection available databases
use databasename;
Information database, table, column, users, permissions, and tables are stored in a database, display the stored command Show
1) Display Database
SHOW DATABASES;
2) obtaining the current available table database
show tables;
3) Display table column
show columns from customers; 等同于 describe customers;
4) Other statements show:
show status; display a wide range of server status information
show create database xxx; show create table xxx; display create statement
show grants; display security permissions granted to the user
show errors; show warnings; display server errors or warnings