Topic: Oracle Certified Professional Exams (OCP & OCA) >> about subqueries
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| suresh |
Posted: Nov 09, 2006 09:19:06 AM |
Total Post: 71
Joined: May, 2006
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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
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Please let me know the correct answer
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 ozkucur |
| Posted: Nov 09, 2006 04:22:09 PM |  |
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Total Post: 23
Joined: Oct, 2006
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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.
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| Jayanta |
| Posted: Nov 09, 2006 04:42:43 PM | |
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Total Post: 479
Joined: Feb, 2006
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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.
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| nitesh |
| Posted: Dec 02, 2006 12:54:00 AM | |
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Total Post: 3
Joined: Dec, 2006
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