1.mysql -uroot -p 123456
2.show databases; 查看全部數據庫
3.select database(); 查看當前數據庫
4.show variables like 'port';
5. 查看當前數據庫大小，如查看springdata庫大小
select concat(round(sum(data_length)/(1024*1024),2) + round(sum(index_length)/(1024*1024),2),'MB') as 'DB Size'
-> from tables
-> where table_schema='springdata';
6. 查看數據所占有的空間
select concat(round(sum(data_length)/(1024*1024),2),'MB') as 'DB Size'
-> from tables
-> where table_schema='springdata';
7.查看索引所占用的空間
select concat(round(sum(index_length)/(1024*1024),2),'MB') as 'DB Size'
-> from tables
-> where table_schema='INVOICE';
8.查看數據庫編碼
show variables like 'character%';
9.status
10.show tables;
11. 查看權限
show grants for 'root'@'localhost';
12.某個人的權限
show grants for 'root'@'localhost';