Advanced SQL
Which of the following statements is true concerning subqueries?

Does not start with the word SELECT.
Involves the use of an inner and outer query.
Cannot return the same result as a query that is not a subquery.
All of these

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Advanced SQL
Which of the following is a correlated subquery?

Uses the result of an inner query to determine the processing of an outer query.
Uses the result of an inner query to determine the processing of an inner query.
Uses the result of an outer query to determine the processing of an inner query.
Uses the result of an outer query to determine the processing of an outer query.

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Advanced SQL
A UNION query is which of the following?

Combines the output from multiple queries and must include the same number of columns.
Combines the output from multiple queries and does not include the same number of columns.
Combines the output from no more than two queries and does not include the same number of columns.
Combines the output from no more than two queries and must include the same number of columns.

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Advanced SQL
Which of the following is true concerning triggers?

They have an event, condition, and action.
They execute against only some applications that access a database.
They cannot cascade (cause another trigger to fire).
You do not create them with SQL.

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