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Introduction to SQL

Introduction to SQL
Which of the following SQL commands is used to retrieve data?

INSERT
DELETE
JOIN
SELECT

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Introduction to SQL
A subquery in an SQL SELECT statement:

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

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Introduction to SQL
The keyword BETWEEN can be used in a WHERE clause to refer to a range of values.

False
True

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Introduction to SQL
Which SQL keyword is used to sort the result-set?

SORT BY
ORDER
SORT
ORDER BY

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Introduction to SQL
The SQL statementSELECT SUBSTR('123456789', INSTR('abcabcabc', 'b'), 4) FROM DUAL;

456789
6789
1234
2345

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Introduction to SQL
The keyword LIKE can be used in a WHERE clause to refer to a range of values.

True
False

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