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Introduction to SQL

Introduction to SQL
The SQL statementSELECT ROUND(45.926, -1) FROM DUAL;

prints 045.926
prints 50
prints garbage
is illegal

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Introduction to SQL
The SQL keyword BETWEEN is used:

None of these
as a wildcard.
for ranges.
to limit the columns displayed.

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

True
False

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Introduction to SQL
The result of every SQL query is a table.

False
True

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

True
False

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Introduction to SQL
'AS' clause is used in SQL for

Projection operation.
Join operation.
Rename operation.
Selection operation.

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