Database Systems Practice Test 271
Relational Algebra Quiz Questions with Answers PDF Download - 271
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Relational Algebra Quiz with Answers PDF Download: MCQs 271
The relational-algebra operations can be grouped together into a
- relational-algebra query
- relational-algebra operation
- relational-algebra expression
- relational-algebra function
The practice of generalization is a simple inversion of
- Inheritance
- Dependency
- Specialization
- Relationships
In A4 search, if only one record is retrieved, the time cost calculated will be same as that for
- A1
- A2
- A3
- A5
A cross-tabulation table is different from
- Relational tables
- Irrelational tables
- Query tables
- Structured tables
Some implementations of SQL also allow us to test whether the result of a comparison is unknown, by the clauses
- Is unknown
- Unknown
- Is not unknown
- Both A and C
Database Systems Exam Prep Tests
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