Database Systems Competitive Exam MCQs – Practice Test 5 (Chapter 15)

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The MCQ: In result if we want to retain all duplicates, we must write; "Database Systems MCQs" App Download [Free] with answers: join operator, join all operator, union operator, and union all operator to learn computer engineering courses. Solve DBMS for Competitive Exams Quiz Questions, download Google e-Book (Free Chapter) for top computer science schools in the world.

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MCQ: 21

In result if we want to retain all duplicates, we must write

Join all operator
Join operator
Union operator
Union all operator

MCQ: 22

For renaming attributes, the as clause can appear in

Select clause
Where clause
From clause
Both A and C

MCQ: 23

A floating-point number, with precision can be initialized by type

float
real precision
double precision
numeric

MCQ: 24

The SQL DDL includes the schema for each relation and

Type of attribute's values
Integrity Constraints
Set of indices
All of the Above

MCQ: 25

SQL provides a way of renaming the attributes of a result relation, taking the form

old-name to new-name
old-name as new-name
ALTER old-name to new-name
ALTER old-name at new-name

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