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Topic: Oracle Certified Professional Exams (OCP & OCA) >> about subqueries

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 Title: about subqueries
 suresh  Posted: Nov 09, 2006 09:19:06 AM

 Total Post: 71
 Joined: May, 2006






 QUESTION NO: 74
Which three statements about subqueries are true? (Choose three)

A. A single row subquery can retrieve only one column and one row.

B. A single row subquery can retrieve only one row but many columns.
C. A multiple row subquery can retrieve multiple rows and multiple columns.

D. A multiple row subquery can be compared by using the “>” operator.

E. A single row subquery can use the IN operator.

F. A multiple row subquery can use the “=” operator.

Answer: B, C, D
=========================
Please let me know the correct answer

 ozkucur
Posted: Nov 09, 2006 04:22:09 PM  

 Total Post: 23
 Joined: Oct, 2006






 
I don't know the answer exactly. But I'm sure that B,C,D is not correct. I have chosen them in the exam and missed it :(.
According to Azzain's answers, A,E,F are the correct answers.

 Jayanta
Posted: Nov 09, 2006 04:42:43 PM  

 Total Post: 479
 Joined: Feb, 2006






 
ingle row subquery: queries that return only one row from the inner select statement.
u can use single row comparison operatorlike =,<,>,>=,<=,<>
multiple row subquery: queries that return more than one row from the inner select statement.
multiple-row comparison operators are in,any,all.
now decide.

 nitesh
Posted: Dec 02, 2006 12:54:00 AM  

 Total Post: 3
 Joined: Dec, 2006






 
a,c,e us right answer

 Time Zone: EDT

  




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