grant

Grant access to subset of table to user on PostgreSQL

牧云@^-^@ 提交于 2020-01-04 02:50:28
问题 I know that I can use views to grant access to a subset of attributes in a table. But how can I grant access to particular tuples only? Say I have a table of registered students, a username attribute and then some other like degree_status, how do I grant access so that user A can only select from the table a tuple corresponding to username A ? I have a database exam and I'm studying some past papers and I came across this question but I don't know how to answer it and I cant find how to do it

Oracle学习的第一章

混江龙づ霸主 提交于 2020-01-04 00:04:19
测试笔记0103 oracle默认用户 用户 密码 SYS 无 System 1 SCOTT 和System密码一样 用命令行登录 #链接Oracle 启动/执行 sqlplus /nolog #登录账户 用户/密码 conn System/1 SCOTT用户默认访问的表 Select * from emp ; set linesize 150 ; --设置每行字符数 set pagesize 10 ; --设置每页显示的10行数据; desc emp ; --查看emp的表结构; show user ; --查看当前用户; 表空间操作 --创建表空间 create tablespace Dome01 --表空间名称 datafile 'D:/2_data/Dome01.dbf' --创建表文件 size 50 M --默认大小 autoextend on ; --自动扩展 --修改表空间名称 Alter databasespace Dome01 Rename to Dome02 ; --删除表空间 Drop tablespace Dome02 ; select * form dba_free_sapce ; --查看当前数据库的自由表空间 select * from user_free_space ; --查看当前用户的自由表空间 创建新用户 Create user

MySQL用户管理

爱⌒轻易说出口 提交于 2020-01-01 01:45:54
用户管理主要有以下作用: 1. 可以限制用户访问哪些库、哪些表 2. 可以限制用户对哪些表执行SELECT、CREATE、DELETE、ALTER等操作 3. 可以限制用户登录的IP或域名 4. 可以限制用户自己的权限是否可以授权给别的用户 一.创建MySQL用户: 创建MySQL用户有三种方法: 1.通过CREATE USER命令进行创建用户 语法:CREATE USER 'username'@'host' [IDENTIFIED BY 'PASSWORD'] 其中密码是可选项; mysql> create user www@'localhost' identified by '123456'; Query OK, 0 rows affected (0.00 sec) mysql> create user www@'%' identified by '123456'; Query OK, 0 rows affected (0.00 sec) mysql> create user www@'192.168.1.10'; Query OK, 0 rows affected (0.00 sec) 说明:该方法创建出来的用户只有连接数据库的权限,需要后续继续授权; 2.通过 GRANT 命令创建用户(常用方法) 这种方法进行创建的用户,当数据库存在用户的时候GRANT会对用户进行授权

mysql- How to apply grants to column?

我与影子孤独终老i 提交于 2019-12-31 05:48:17
问题 username - revoke select to database.Person I set GRANT SELECT (id) ON database.Person TO 'username'@'localhost' not is work -> SELECT secret FROM Person // Good! not is work -> SELECT id FROM Person WHERE secret = 1 // BAD! I need that would SELECT id FROM Person WHERE secret = 1 is worked! 回答1: I'm not sure that I'm understanding the question correctly, but it seems to be asking for the ability to restrict the person selecting data from the Persons table so that they cannot see the value in

MySql grant user permission

旧城冷巷雨未停 提交于 2019-12-30 06:55:08
问题 I want to create a new user in MySql. I do not want that new user to do much with my existing databases [I just want to grant Select privilege to him], but he can do anything and everything with a new database which he creates. Firstly, is there a way to grant permission as per the database owner? If it is possible, then that is the ideal thing I am looking for. And if not, then how do I restrict a particular user from accessing [only Select privilege] some specific database only, allowing

远程连接mysql数据库配置

若如初见. 提交于 2019-12-29 21:49:37
1. 配置连接端mysql设置 vim /etc/mysql/mysql.conf.d/mysql.cnf #更改mysql.conf文件第43行绑定地址为mysql主机的 外网 地址. 43 bind-address = 192.168.0.1 2. 主机授权. 主机进入mysql. 输入授权命令 grant all privileges on 授权的数据库.数据库中的具体表 to '连接端用户'@'连接端IP地址' identified by '连接端输入的密码' with grant option; 例如:(授予IP- 外网 地址-为192.168.0.2下的root用户使用密码mypassword登录时,对mydatabase数据库下所有表格操作的权限.) grant all privileges on mydatabase.* to 'root'@'192.168.0.2' identified by 'mypassword' with grant option; 激活授权 flush privileges; 完成. 来源: https://www.cnblogs.com/jrri/p/11508199.html

mysql----用户、权限

独自空忆成欢 提交于 2019-12-29 14:44:25
权限:限制用户能够进行的数据库的操作。 create drop alter update delete insert select create view:创建视图 index:索引权限 execute:执行存储过程的权限 用户: 创建用户:create user 'usr_name'@'localhost' indentified by '密码'; 刚创建的用户没有使用数据库的权限。 删除用户:drop user 'user_name'@'localhost'; 分配用户权限:with grant option代表这个用户具备给其他用户分配权限的权限; grant 权限(列名)on 数据库对象 to 用户 indentified by '密码' with grant option; 如:grant all privileges on *.* to 用户 indentified by '密码'; flush privileges; grant insert,update,select,delete on db.table to 用户 indentified by '密码'; 查看用户权限: show grants; show grants for 'user_name'@'localhost'; 删除权限: revoke 权限 on 数据库对象 from 用户; 来源: CSDN

【MySQL】How to grant a user permission to only view a mysql view?

放肆的年华 提交于 2019-12-29 11:36:08
Grant a user permission to only view a mysql view https://stackoverflow.com/questions/3108656/grant-a-user-permission-to-only-view-a-mysql-view GRANT SELECT ON <database_name>.<view_name> TO <user>@<host> IDENTIFIED BY '<password>'; GRANT SHOW VIEWON <database_name>.<view_name> TO <user>@<host>IDENTIFIED BY '<password>'; 请注意,执行create view命令的用户(称为视图定义者)也对此有影响,如果使用视图的definer != 用户,那么这可能会造成很大的混乱。 例如,如果定义者仅对基础表具有select权限,而另一个用户对视图具有update权限,则尝试更新视图将导致权限被拒绝错误。 Grant permissions on views, deny select on tables https://dba.stackexchange.com/questions/86802/grant-permissions-on-views-deny-select-on

实现Mysql的远程登录 ZT

为君一笑 提交于 2019-12-29 02:13:35
转自: http://www.mike.org.cn/blog/index.php?load=read&id=220 Mysql默认是不允许远程连接的,因为有很大的安全隐患。   需要手动增加可以远程访问数据库的用户。   方法一、本地登入mysql,更改 "mysql" 数据库里的 "user" 表里的 "host" 项,将"localhost"改为"%" #mysql -u root -proot mysql>use mysql; mysql>update user set host = '%' where user = 'root'; mysql>select host, user from user;   方法二、直接授权( 推荐 )   从任何主机上使用root用户,密码:youpassword(你的root密码)连接到mysql服务器: # mysql -u root -proot mysql>GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY 'youpassword' WITH GRANT OPTION;   允许地址202.11.10.253上用root用户,密码dboomysql来连接mysql的所有数据库,付给select,insert,update,delete权限。 # mysql -u root

Oracle权限总结

允我心安 提交于 2019-12-27 17:54:07
1、为A用户添加B用户的表权限 grant select on 表名 to 用户名;–查 grant delete on 表名 to 用户名;–删 grant insert on 表名 to 用户名;–增 grant update on 表名 to 用户名;–改 解决问题:PLSQL创建过程时报错:没有表或者视图(表存在,但没在该用户下) 来源: CSDN 作者: milu777 链接: https://blog.csdn.net/milu777/article/details/103733806