336x280(권장), 300x250(권장), 250x250, 200x200 크기의 광고 코드만 넣을 수 있습니다.
- Database security :
- System security
- Data Security
- DBA : A high-level user
- creates users
- grants users access to the database and object
- USER
- Require system privileges to gain access to the database
- Require database privilege to manipulate the content of the objects in the database.
- Can be given the privilege to grant additional privilegs to other users or to roles.
- Schemas : A collection of objects
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