Topic: Oracle Certified Professional Exams (OCP & OCA) >> Plz help me on this question related(1Z0-007)
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| Title: Plz help me on this question related(1Z0-007) |
| naidu |
Posted: Dec 26, 2006 06:36:34 AM |
Total Post: 85
Joined: Nov, 2006
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Which three statements about subqueries are true? (Choose three.)
A. A main query can have more than one subquery.
B. A subquery can have more than one main query.
C. The subquery and main query must retrieve data from the same table.
D. The subquery and main query can retrieve data from different tables.
E. Only one column or expression can be compared between the subquery and main query.
F. Multiple columns or expression can be compared between the subquery and main query.
Answer:
Plz Help me |
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 Jayanta |
| Posted: Dec 26, 2006 01:54:29 PM |  |
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Total Post: 479
Joined: Feb, 2006
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a,d,f r correct.
a subquery can go to a depth of 255 subqueries.
there is multi column subquery where more than one col./expr can be compared.
the main query and subquery can fetch data from different tables.
hope this will help
with regards
jayanta
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