Beginning SQL

The second query is a negative, in that it requires that the Street field should not end in either Road or
Street. Using the NOT and LIKE operators in conjunction with one another is the obvious choice. Another
obvious choice is to use the AND operator, which tells the database to search the Street field for streets
that don’t end in Street and don’t end in Road.
SELECT FirstName, LastName, Street
FROM MemberDetails
WHERE Street NOT LIKE ‘% Road’ AND Street NOT LIKE ‘% Street’;
Executing the SQL provides the results you want:
FirstName LastName Street
John Jackson Long Lane
John Jones Newish Lane
Jenny Jones Newish Lane
Seymour Botts Long Lane
Jamie Hills Newish Lane
Stuart Dales Long Lane
IN Operator
So far you’ve used the OR operator to check whether a column contains one of two or more values. For
example, if you want to check whether a member lives in Townsville, Windy Village, Dover, or Big City,
you’d write the following:
SELECT City
FROM MemberDetails
WHERE
City = ‘Townsville’
OR
City = ‘Windy Village’
OR
City = ‘Dover’
OR
City = ‘Big City’;
That query is a bit long-winded, and that’s where the IN operator helps: it functions exactly like the OR
operator but requires much less typing!
Using the IN operator, you can rewrite the preceding SQL like this:
SELECT City
FROM MemberDetails
WHERE
City IN (‘Townsville’, ‘Windy Village’, ‘Dover’, ‘Big City’);
Extracting Information
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