SQL Data Definition Trivia Questions and Answers PDF Download eBook p. 425
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"The constraint on an attribute specifies that the null value is not allowed for that attribute, is known to be", sql data definition Multiple Choice Questions (MCQ) with choices foreign key attribute, candidate key attribute, unique key attribute, and not null attribute to study online training courses. Learn introduction to sql questions and answers with free online certification courses for BSc computer science.
SQL Data Definition Questions and Answers PDF Download eBook
MCQ: The constraint on an attribute specifies that the null value is not allowed for that attribute, is known to be
- Candidate key attribute
- Foreign key attribute
- Unique key attribute
- Not Null attribute
D
MCQ: The contrast to the relational data model, is
- Semi-structured data model
- Object-based Data model
- Entity relationship model
- Relation View data model
A
MCQ: Dates must be specified in the format
- day-year-month
- year-month-day
- year-date-month
- month-year-date
B
MCQ: An index entry appears for only some of the search-key values, in a
- Clustering index
- Non-clustering index
- Sparse index
- Dense index
C
MCQ: To simplify users interaction with the system, data abstraction uses
- 2 levels
- 3 levels
- 4 levels
- 5 levels
B