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Introduction to SQL

Introduction to SQL
To establish a range of values, < and > can be used.

True
False

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Introduction to SQL
The SQL keyword BETWEEN is used:

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

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Introduction to SQL
A subquery in an SQL SELECT statement:

can always be duplicated by a join.
cannot have its results sorted using ORDER BY.
has a distinct form that cannot be duplicated by a join.
can only be used with two tables.

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Introduction to SQL
The SQL statement that queries or reads data from a table is ________ .

QUERY
READ
SELECT
None of these

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Introduction to SQL
Which of the following is illegal?

SELECT SYSDATE - (SYSDATE + 2) FROM DUAL;
None of these
SELECT SYSDATE - SYSDATE FROM DUAL;
SELECT SYSDATE - (SYSDATE - 2) FROM DUAL;

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Introduction to SQL
To remove duplicate rows from the results of an SQL SELECT statement, the ________ qualifier specified must be included.

DISTINCT
SINGLE
UNIQUE
ONLY

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