創建授權:grant select on 數據庫.* to 用戶名@登錄主機 identified by /"密碼/" 修改密碼:mysqladmin -u用戶名 -p舊密碼 password 新密碼 刪除授權: revoke select,insert,update,delete om *.* from test2@localhost;
增加列:ALTER TABLE t2 ADD c INT UNSIGNED NOT NULL AUTO_INCREMENT,ADD INDEX (c); 修改列:ALTER TABLE t2 MODIFY a TINYINT NOT NULL, CHANGE b c CHAR(20); 刪除列:ALTER TABLE t2 DROP COLUMN c;