Database - Advanced SQL

Exercise :: Advanced SQL - True or False

11. 

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

A. True
B. False

Answer: Option B

Explanation:

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12. 

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

A. True
B. False

Answer: Option B

Explanation:

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13. 

A function returns one value and has only output parameters.

A. True
B. False

Answer: Option B

Explanation:

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14. 

With the UNION clause, each query involved must output the same number of columns, and they must be UNION compatible.

A. True
B. False

Answer: Option A

Explanation:

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