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1z0-071 – Oracle Datbase 12c SQL

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Showing 1–3 of 15 questions

Question 1

Which two statements are true regarding subqueries? (Choose two.)

Select all that apply, then click Submit answer.

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    A subquery can appear on either side of a comparison operator.
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    Only two subqueries can be placed at one level.
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    A subquery can retrieve zero or more rows.
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    A subquery can be used only in SQL query statements.
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    There is no limit on the number of subquery levels in the WHERE clause of a SELECT statement.
Question 2

Examine the description of the ORDERS table:

Examine the description of the INVOICES table:

Examine this query:

Which three rows will it return? (Choose three.)

Select all that apply, then click Submit answer.

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    5 01-MAR-2019
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    3

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    1

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    4 01-FEB-2019
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    2

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    5

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    3 01-JAN-2019
Question 3

Which two statements are true regarding views? (Choose two.)

Select all that apply, then click Submit answer.

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    The WITH CHECK OPTION constraint can be used in a view definition to restrict the columns displayed through the view.
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    The OR REPLACE option is used to change the definition of an existing view without dropping and re-creating it.
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    Rows cannot be deleted through a view if the view definition contains the DISTINCT keyword.
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    Rows added through a view are deleted from the table automatically when the view is dropped.
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    A simple view in which column aliases have been used cannot be updated.
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    A subquery used in a complex view definition cannot contain group functions or joins.