Q. Which subquery returns a single value?

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Q. Usage of aggregates in WHERE clause is allowed.

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Q. Which operators are used when a subquery returns multiple rows to be evaluated in comparison to the outer query?

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Q. The ALL subquery performs which operation?

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Q. Which of these operators perform similar operations like ALL and ANY?

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Q. Which operators test whether a subquery returns any rows?

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Q. An uncorrelated subquery does not contain any reference to the values from the outer query.

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Q. Which subquery cannot be executed by itself as a separate statement?

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Q. Which of these operators does not perform relative-value comparisons?

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Q. To combine multiple retrievals, we write several SELECT statements and put the keyword between them. What is the keyword?

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Q. Which keyword used with UNION does not retain duplicate rows?

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Q. Which keyword used with UNION retains duplicate rows?

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Q. The UNION ALL has a higher precedence than UNION DISTINCT.

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Q. Which clause is used to sort a UNION result as a whole?

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Q. Suppose it is desired that UNION operation should return not more than 3 rows. Which keyword is used for this?

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Q. Which table is used to run a UNION-type query on MyISAM tables?

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Q. SELECT on a MERGE table is like _____________

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Q. Which of these is also known as a virtual table?

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Q. A View can be used to select a subset of the table columns.

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Q. A view can refer to multiple tables via __________

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