SIMPLIFICATION APTITUDE QUIZ

A transaction is the complete set of closely related update commands that must all be done, or none of them done, for the database to remain valid.

True

False

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A CASE SQL statement is which of the following?

A way to establish a data definition in SQL.

A way to establish a loop in SQL.

A way to establish an IF-THEN-ELSE in SQL.

All of these

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A correlated subquery is where the outer query depends on data from the inner query.

False

True

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What type of join is needed when you wish to include rows that do not have matching values?

All of these

Outer join

Equi-join

Natural join

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A function returns one value and has only output parameters.

True

False

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What type of join is needed when you wish to return rows that do have matching values?

All of these

Outer join

Natural join

Equi-join

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How many tables may be included with a join?

All of these

One

Three

Two

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When AUTOCOMMIT is set on, changes will be made automatically at the end of each SQL statement.

True

False

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Outer join is the same as equi-join, except one of the duplicate columns is eliminated in the result table.

False

True

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Which of the following is a correlated subquery?

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

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