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Introduction to SQL

Introduction to SQL
SQL provides five built-in functions: COUNT, SUM, AVG, MAX, MIN.

True
False

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Introduction to SQL
Each index consumes extra storage space and also requires overhead maintenance time whenever indexed data change value.

False
True

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Introduction to SQL
Indexes may be created or dropped at any time.

True
False

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Introduction to SQL
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.

False
True

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Introduction to SQL
The SQL WHERE clause:

Both A and B are correct.
limits the column data that are returned.
limits the row data are returned.
Neither A nor B are correct.

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Introduction to SQL
In SQL, which command is used to change a table's storage characteristics?

None of these
ALTER TABLE
CHANGE TABLE
MODIFY TABLE

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