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Introduction to SQL

Introduction to SQL
SQL is a data sublanguage.

True
False

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Introduction to SQL
COUNT(field_name) tallies only those rows that contain a value; it ignores all null values.

False
True

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Introduction to SQL
Which of the following SQL query is correct for selecting the name of staffs from 'staffinfo' table where salary is 10,000 or 25,000?

SELECT name FROM staffinfo WHERE salary IN (10000, 25000);
None of these
Both A and B
SELECT name FROM staffinfo WHERE salary BETWEEN 10000 AND 25000;

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Introduction to SQL
The SQL WHERE clause:

limits the column data that are returned.
limits the row data are returned.
Both A and B are correct.
Neither A nor B are correct.

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Introduction to SQL
Which of the following is the correct order of keywords for SQL SELECT statements?

SELECT,WHERE,FROM
SELECT, FROM, WHERE
WHERE, FROM,SELECT
FROM, WHERE, SELECT

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Introduction to SQL
The Microsoft Access wildcards are ____ and ____ .

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

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