1、常見命令
1.1、檢視所有賬戶資訊
select host,user from mysql.user;
select distinct concat('user: ''',user,'''@''',host,''';') as query from mysql.user;
1.2、修改賬戶密碼
use mysql;
update user set authentication_string=password('root123!') where user='root';
1.3、建立賬戶
create user 'deployusr'@'localhost' identified by 'deploy123!';
create user 'deployusr'@'%' identified by 'deploy123!';
1.4、給庫賦予許可權
use deploy;
grant all privileges on deploy to 'deployusr'@'localhost';
grant select,insert,update,delete,create,drop on deploy.* to 'deployusr'@'localhost';
grant all privileges on deploy.* to 'deployusr'@'%';
1.5、對錶賦予許可權
grant select,insert,update,delete,create,drop on deploy.table1 to 'deployusr'@'%';
1.6、普通使用者想要匯出資料庫中的表需要賦予file許可權
首先賦予其他許可權
grant select,insert,update,delete,create,drop on deploy.* to 'deployusr'@'%';
然後賦予file許可權
grant file on *.* to deployusr@'%';
flush privileges;
預設只能匯出到/var/lib/mysql-files目錄,匯入其他目錄會報錯
1.7、檢視使用者許可權
show grants for deployusr;
show grants for 'deployusr'@'%';
1.8、撤銷許可權
revoke all on deploy from 'deployusr'@'localhost';
flush privileges;
1.9、刪除使用者和庫
delete from user where user='deployusr' and host='localhost';
或者drop user 'deployusr'@'localhost';
flush privileges;
drop database deploy;
1.10、備份資料庫
mysqldump -u root -h host -p deploy > backup_deploy.sql
1.11、備份表
mysqldump -u root -h host -p deploy table1, table2 > backup_deploy_table.sql
1.12、
批量執行插入等操作
把命令寫入.sql的檔案中
登入資料庫
進入相應表
source .sql
1.13、檢視表空間
select table_name, concat(truncate(data_length/1024/1024,2),'mb') as data_size,
concat(truncate(index_length/1024/1024,2),'mb') as index_size
from information_schema.tables where table_schema = 'missing_cust'
group by table_name
order by data_length desc;
2、跳過密碼登入
vi /etc/my.cnf
skip-grant-tables
3、最大超時時間設定
參考:4、鎖表問題
參考:5、truncate
參考:
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