DCL commands are used to enforce database security in a multiple user database environment. Two types of DCL commands are GRANT and REVOKE. Only Database Administrator's or owner's of the database object can provide/remove privileges on a database object. SQL GRANT Command SQL GRANT is a ...
2.授予A用户访问B用户所有表权限,另存为.sql后缀,放在Command里面执行。 select 'GRANT select, insert, update, delete ON B.'|| 表名||' to A;' from user_tables; 1. 创建所有表的私有同义词,在A用户上创建 select 'create synonym '||同义词名称||' for B.'||表名||';' from user_tables w...
mysql> grant all on *.* to mydba@"%" identified by "abc123" with grant option; ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'identified by "123qqq...A" with grant option...
8 rows in set (0.00 sec) mysql> drop user 'yangxin'@'localhost'; 六、用户重命名 shell> rename user 'test3'@'%' to 'test1'@'%'; 七、修改密码 1> 更新mysql.user表 mysql> use mysql; # mysql5.7之前 mysql> update user set password=password('123456') where user='root'; # mysql5.7...
在 He3DB 的源代码中, GrantRole(@src\backend\commands\user.c) 是处理角色授予和撤销的函数,通常用于执行相关的 SQL 语句。当调用 GrantRole 函数时,会根据 GrantRoleStmt 结构体中的信息执行授予或撤销角色的操作。 /* * GrantRoleStmt
Learn to set table-level permissions in SQL Server Management Studio for secure database access with this simple, step-by-step guide from Atlassian.
SQL Server Basics SQL Server Advanced Alter Login Alter Table Change Password Check Constraints Comments in SQL Create Login Create Table Create User Data Types Declare Variables Drop Login Drop Table Drop User Find Logins Find Users Functions ...
t VALUES ROW(2); ERROR 1142 (42000): INSERT command denied to user 'u'@'localhost' for table 't' In privilege assignments, MySQL interprets occurrences of unescaped _ and % SQL wildcard characters in database names as literal characters under these circumstances: When a database name is...
```sql drop view vi_name; drop index in_name; ``` **14. show database** 通过show database只能看到你拥有的某些权限的数据库,除非你拥有全局SHOW DATABASES权限。 对于p1@localhost用户来说,没有对mysql数据库的权限,所以以此身份登陆查询时,无法看到mysql数据库: ...
mysql>update mysql.usersetauthentication_string=password('123456')where user='root';ERROR1064(42000):You have an errorinyourSQLsyntax;check the manual that corresponds to your MySQL server versionforthe right syntax to use near'('123456') where user='root''at line1 ...