The SELECT command, with its various clauses, allows users to query the data con

Question

The SELECT command, with its various clauses, allows users to query the data contained in the tables and ask many different questions or ad hoc queries.

Options:

A . True

B . False

Answer: Option A

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Question 1. The rows of the result relation produced by a SELECT statement can be sorted, but only by one column.....

Question 2. A SELECT statement within another SELECT statement and enclosed in square brackets ([...]) is called a subquery.....

Question 3. There is an equivalent join expression that can be substituted for all subquery expressions.....

Question 4. SQL is a programming language.....

Question 5. A dynamic view is one whose contents materialize when referenced.....

Question 6. Indexes can usually be created for both primary and secondary keys.....

Question 7. SELECT DISTINCT is used if a user wishes to see duplicate columns in a query.....

Question 8. Each index consumes extra storage space and also requires overhead maintenance time whenever indexed data change value.....also requires overhead maintenance time whenever indexed data change value.

Question 9. The HAVING clause acts like a WHERE clause, but it identifies groups that meet a criterion, rather than rows.....

Question 10. The qualifier DISTINCT must be used in an SQL statement when we want to eliminate duplicate rows.....

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