Authority!!
•Oracle users have ID and password
•Own objects that they create
•Have access to other objects if have
privileges:
–E.g. create table privilege
–Select privilege
–Delete privilege
–Grant privilege
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Create Table Privilege - Buisness Management - Lecture Slides, Slides of Business Administration
Business Management is one of the most important subject in Management sciences. Following are the key points discussed in these Lecture Slides : Create Table Privilege, Authority, Oracle, Privileges, Select Privilege, Delete Privilege, Grant Privilege, System, Create a User, Number of Allowed Failures
Typology: Slides
2012/2013
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Authority!!
- Oracle users have ID and password
- Own objects that they create
- Have access to other objects if have privileges: - E.g. create table privilege - Select privilege - Delete privilege - Grant privilege
Create a user
- Two users by default:
- System: all privilege
- SYS used by ORACLE Create user FRED identified by Mypassword
- Single login can be arranged with external command (e.g. with NT login)
- Possible to set any limits – e.g. resources, tablespaces, quotas
Standard Roles
- Before users are active need to assign roles
- CONNECT: access to DB + any other granted rights
- RESOURCE: creation of objects
- DBA: unlimited space quotas + grant privileges to other users Grant privilege / role to user [with admin option] Revoke privilege / role from user Drop…
Other Grant command
- CONNECT and RESOURCES don’t give automatic access to other people’s resources
- Need to grant access Grant OBJECT PRIVILEGE on OBJECT to USER [with grant option]
- Object privilege = select, insert, update, delete
- Can be granted on certain column and not on others
3 aspects of security
- Secrecy: info not disclosed to
unauthorised users
- Integrity: modifications of data must be
legitimate
- Availability: authorised users should not be
refused access (e.g. by mistake)
External security
- Bear in mind that DBMS security is not
only issue
- Operating system security
- Network security
- Logical access (through an application)
- As well as physical access (directly into
files)
Other security layers - Policies
- Security policies apply to table level - each table can have a separate one
- They execute everytime a table is accessed by adding a bit of SQL to the where clause
- No need to write a policy for each table
- But can have more than one per table- e.g. select, insert, update, delete! Add policy command
Row level security
- Fine-grained access control
- Add extra column to table
- Populate column with name of current
user
- Others won’t get to see the column until it
is committed
- Simplest form of locking