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Author Question: Which one of the following is(are) the core retrieval operation(s) for relational databases? A) ... (Read 19 times)

cookcarl

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on: Jul 7, 2018
Which one of the following is(are) the core retrieval operation(s) for relational databases?
 
  A) Joining B) Selection
  C) Projection D) All of the above

Question 2

In a query with a subquery, outer subquery always executes first.
 
  Indicate whether the statement is true or false


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ktidd

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Reply #1 on: Jul 7, 2018
Answer to Question 1

D

Answer to Question 2

FALSE


cookcarl

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Reply 2 on: Jul 7, 2018
Gracias!

aliotak

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Reply 3 on: Yesterday
Excellent

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