Question
The result of a SELECT statement can contain duplicate rows.Select one: True False 2. Which of the Following Is Not A DatabaseModel? Select one: a.
The result of a SELECT statement can contain duplicate rows.Select one: True False
2. Which of the Following Is Not A DatabaseModel? Select one: a. Network Database Model b. Relational DatabaseModel c. Object Oriented Database Model d. None of the above
3. Theunique constraint specifies that the value of an attribute must bedifferent from all other values of the same attribute that existwithin a relation. Select one: True False
4. Select the BESTanswer. In a real relational database system, if you try to join(natural join) tables R and S and R is empty (that is, it has notuples), Select one: a. the system reports an error. b. the answerset is an empty table. c. the answer set is the same as table S. d.the answer set consists of just one row. e. an answer set isreturned; however, the results are system dependent.
Step by Step Solution
3.52 Rating (176 Votes )
There are 3 Steps involved in it
Step: 1
1 True A SELECT statement can indeed return duplicate rows This can occur if multiple rows within th...
Get Instant Access to Expert-Tailored Solutions
See step-by-step solutions with expert insights and AI powered tools for academic success
Step: 2
Step: 3
Ace Your Homework with AI
Get the answers you need in no time with our AI-driven, step-by-step assistance
Get Started
Accounting Information Systems The Crossroads of Accounting & IT
Authors: Donna Kay, Ali Ovlia
2nd Edition
132991322, 978-0132991322
