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Introduction to SQL

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

True
False

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Introduction to SQL
Which of the following join is also called as an 'inner-join'?

Non-Equijoin
None of these
Self-Join
Equijoin

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Introduction to SQL
A subquery in an SQL SELECT statement is enclosed in:

braces -- {...}.
CAPITAL LETTERS.
brackets -- [...].
parenthesis -- (...) .

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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
The SQL statement: SELECT Number1 + Number 2 AS Total FROM NUMBER_TABLE; adds two numbers from each row together and lists the results in a column named Total.

True
False

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Introduction to SQL
The SQL keyword BETWEEN is used:

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

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