--创建登陆用户

--create login login_name from windows with default_database = database | default_language = language;

create login [localhost\hoojo-pc] from windows with default_database = testHome;

--创建登陆用户

--create login login_name with password = 'pwd' [hashed] [must_change] [check_expiration] [check_policy]

create login admin with password = '123456', default_database = testHome;

--查看登陆用户

select * from sys.sql_logins;

--修改用户

alter login admin with name = jackson;

alter login jackson with password = 'abcd';

--禁用、启用用户

alter login jackson disable;    --禁用

alter login jackson enable;        --启用

--删除用户

drop login jackson;

--修改映射凭据(将登录名MacraeS 映射到凭据Custodian04)

alter login jackson with credential = Custodian04;

-------数据库用户

--创建数据库用户

create user jack from login admin;

create user jason for login jackson;

create user jack from login admin with default_schema = temp_schema;

--启动guest用户（不推荐使用）

--特殊用户dbo、guest；sa对应的dbo用户，其他没有映射的用户就是guest用户

grant connect to guest;

--修改用户

alter user jack with name = jason;

alter user jason with default_schema = jason_schema;

--删除用户

drop user jason;

--------数据库角色

--给jack用户授权buyers角色

create role buyers authorIzation jack;

--修改角色

alter role buyers with name = new_buyers;

--删除角色

drop role new_buyers;

--------架构管理

--创建

create schema temp_schema;

--指定用户

create schema jason_scheam authorization jason;

--授权查询

grant select to jason;

--删除

drop schema jason_scheam;

--------权限

--授权创建table

grant create table to jason;

--授权jason查询student表

grant select on student to jason;

--收回权限

revoke create table to jason;

revoke select on student to jason;