grant | 易学教程

Grant alter on only one column in table

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问题 I want to grant a user only to edit one column in my table. What command do I use here? I use the oracle 11g database. I alrdy know how I can grant only read or delete on the whole table but how do I do it for only one column or more? pls give an example. 回答1: For example, you want to grant update privilege on ename column only, then give the following statement (where xyz is the username) grant update (ename) on emp to xyz; Syntax: grant update(column-name) on table-name to user-name EDIT:

Content provider grant uri permission

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问题 I searched and read android developer files but I did not find any satisfactory answer for content provider grant uri permission. Can anybody explain more detailed and more simple. My questions are: What grant uri is using for? What is the differences between grant uri permission true and false When we should use true? when false? and any more detail are appreciated. 回答1: What grant uri is using for? The "grant Uri permissions" feature allows you to have a ContentProvider that is normally

windows下MYSQL5.6.23-64安装过程

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1.下载对应的安装包 mysql-5.6.31-winx64.zip（可以自行在官网上下载） 2.解压安装包 3.进入解压后的目录找到my-default.ini配置文件，这个文件是mysql的主配置文件，修改如下两项内容指定数据库存放位置 4.切换到解压目录下的\bin文件夹，在该文件夹中打开cmd界面，输入命令>mysqld -intall,提示successfull表示安装成功 5.启动MySQL服务>net start mysql,停止可以使用net stop mysql当然也可以在服务里面进行操作 6.修改root的密码 -首先在my-default.ini配置文件中加入一行：skip-grant-tables，重启服务 -其次在安装目录下\bin下打开cmd然后进行面密码登录：mysql -u root -p 回车，这次登录就不用密码了使用mysql数据库：use mysql 修改root的密码：mysql>set password for root@localhost = password('root的密码'); 修改成功后，到my-default.ini中将skip-grant-tables的配置注释掉，然后重启MySQL服务net stop mysql net start mysql 尝试密码登录解压目录\bin>mysql -u root -p

Linux CentOS 6.x 开发配置文档 7

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一，安装二，配置 1，关闭防火墙：/etc/init.d/iptables stop 2，连上服务器：ssh oracle@192.168.0.247 3，登录数据库：sqlplus "/as sysdba"（或： sqlplus / as sysdba ） dba:数据库管理员，拥有管理数据库的最高权限，可以更改、删除其他用户的账户以及权限。 4，启动数据库：startup 5，退出数据库：quit 6，启动数据库监听：lsnrctl start 7，启动控制台：emctl start dbconsole 三，使用 1，查看表空间路径：select * from dba_data_files; 2，创建用户表空间：CREATE TABLESPACE PUSH DATAFILE '/home/oracle/oradata/Push.dbf' SIZE 1024M AUTOEXTEND ON next 100m maxsize 1024m EXTENT MANAGEMENT LOCAL SEGMENT SPACE MANAGEMENT AUTO; Create tablespace examination;//创建表空间examination datafile 'c:\Oracle\zhangwei\examination.dbf'//与表空间关联的文件存放位置

How to check permission SYSTEM_ALERT_WINDOW is granted on Android Lollipop?

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问题 Note that I'm talking about Android Lollipop . For android 6.0 we can use method canDrawOverlays() to check that SYSTEM_ALERT_WINDOW is granted or not. With Android Lollipop, almost devices grant this permission by default. But on some devices of Xiaomi, Meizu.. it is not granted. Users need to go to the App info to allow it. How can we check it programmatically to warn users? 回答1: in MIUI use public static boolean isMiuiFloatWindowOpAllowed(@NonNull Context context) { final int version =

ERROR 1045 (28000): Access denied for user 'username'@'%' (using password: YES)

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问题 I Installed MySQL on my CentOS 6.4 server. I logged into my root and changed its password. Later I thought that I should make a new user and use that user as my default user, So I created a new user name golden using the following command: CREATE USER 'golden'@'%' IDENTIFIED BY 'password'; Then I applied permission to the user golden : GRANT ALL PRIVILEGES ON * . * TO 'golden'@'%'; FLUSH PRIVILEGES; Now this user: golden was able to do everything. So I finally Deleted the root user . Now I am

Execute dynamic DDL in PL/SQL procedure through definer role permissions

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问题 I want to perform some dynamic DDL in a procedure owned by an admin user. I'd like to execute this procedure with a technical operational user with definer rights (operational user doesn't have the create table role). The problem is the 'create table' permission is granted to the admin user through use of a role, which doesn't allow me to execute the DDL as it seems that roles don't count in named pl/sql blocks. create or replace PROCEDURE test_permissions AUTHID DEFINER AS v_query_string

cratedb 3.2.0进行安装

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Cratedb下载地址:https://cdn.crate.io/downloads/releases/nightly/ cratedb官方文档手册:https://crate.io/docs/crate/reference/en/latest/ 1.安装java 安装java，确保版本在1.8以上 [root@localhost ~]# java -version java version "1.8.0_151" Java(TM) SE Runtime Environment (build 1.8.0_151-b12) Java HotSpot(TM) 64-Bit Server VM (build 25.151-b12, mixed mode) 2.创建crate用户因为cratedb不能在root用户下启动,所以需要创建非root用户,我这里创建crate用户 [root@localhost /]# useradd crate [root@localhost /]# passwd crate 密码和用户名一致 3.配置crate环境变量 [crate@localhost ~]$ more .bash_profile # .bash_profile # Get the aliases and functions if [ -f ~/.bashrc ]; then . ~/

Oracle - How to grant to a user the rights to another user's objects

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问题 I need to give to user TARGETUSER the rights to select/insert/update to all tables of user SOURCEUSER (I can figure this all out from here) and the ability to run all their stored procedures. Basically, I wouldn't complain if I can give TARGETUSER the ability for all non-ddl activity with SOURCE_USER's objects. How do I do this? 回答1: You can write a simple procedure to do this: BEGIN FOR Rec IN (SELECT object_name, object_type FROM all_objects WHERE owner='SOURCEUSER' AND object_type IN (

MySQL权限管理

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目录设置用户与权限用户管理 MySQL权限系统介绍最少权限原则创建用户:GRANT命令权限的类型和级别 REVOKE命令权限立即生效使用GRANT和REVOKE的例子设置用户与权限一个MySQL系统可能有许多用户。为了安全起见，root用户通常只用管理目的。对于每个需要使用该系统的用户，应该为他们创建一个账号和密码。这些用户名和密码不必与MySQL之外的用户名称和密码(例如,Linux或NT用户名和密码)相同。同样的原则也适合于root用户。对于系统用户和MySQL用户最好使用不同的密码，这一点对root用户尤其应该这样。为用户设置密码不是必须的，但是强烈建议为所有创建的用户设定密码。要建立一个Web数据库，最好为每个网站应用程序建立一个用户。你可能会问，“为什么要这么做呢？”----答案在于权限。用户管理我们的MySQL的用户，都被记录在了mysql数据库的user表中，如下图: 在MySQL数据库中，一个完整的用户账号应该包含用户名和登录主机，也就是说用户名@主机名才是一个完整的用户账号。创建用户基本语法: CREATE USER 用户名@主机名 IDENTIFIED BY '密码'; 删除用户基本语法: DROP USER 用户名@主机名; 修改用户密码: - 修改自己的密码 set password = password('新密码'

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