=> Integrity constraints are used
- to implement business rules,
- to validate data,
- to ensure data integrity etc..
=> Constraint means rules, rules are used to maintain data integrity.
=> Oracle has the following constraints:
1. PRIMARY KEY
2. UNIQUE
3. NOT NULL
4. CHECK
5. FOREIGN KEY
FAQ
- to implement business rules,
- to validate data,
- to ensure data integrity etc..
=> Constraint means rules, rules are used to maintain data integrity.
=> Oracle has the following constraints:
1. PRIMARY KEY
2. UNIQUE
3. NOT NULL
4. CHECK
5. FOREIGN KEY
FAQ
No comments:
Post a Comment