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Introduction to SQL

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

ALTER TABLE
MODIFY TABLE
CHANGE TABLE
All of these

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Introduction to SQL
What operator tests column for the absence of data?

EXISTS operator
IS NULL operator
NOT operator
None of these

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Introduction to SQL
The SQL -92 wildcards are ____ and ____ .

underscore(_); question mark (?)
percent sign (%); underscore (_)
asterisk (*); percent sign (%)
question mark (?); asterisk (*)

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Introduction to SQL
To sort the results of a query use:

ORDER BY.
SORT BY.
GROUP BY.
None of these

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Introduction to SQL
A subquery in an SQL SELECT statement:

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

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Introduction to SQL
Which of the following are the five built-in functions provided by SQL?

SUM, AVG, MULT, DIV, MIN
SUM, AVG, MIN, MAX, NAME
SUM, AVG, MIN, MAX, MULT
COUNT, SUM, AVG, MAX, MIN

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