Beginning SQL

Because both conditions (YearReleased and Rating) must be true, an AND statement is required to link
them:
YearReleased IN (1967, 1977, 1987)
AND
Rating IN (4,5)
Putting the whole statement together gives you the following SQL:
SELECT FilmName, YearReleased, Rating
FROM Films
WHERE
YearReleased IN (1967, 1977, 1987)
AND
Rating IN (4,5);
Executing the SQL statement provides the following results:
FilmName YearReleased Rating
On Golden Puddle 1967 4
Planet of the Japes 1967 5
Soylent Yellow 1967 5
That completes the look at logical operators for this chapter. Chapter 8 discusses logical operators in
greater depth. The next section focuses on how to order your query’s results.
Ordering Results with ORDER BY
So far, query results have come in whatever order the database decides, which is usually based on the
order in which the data was entered, unless the database is designed otherwise (as you see in later chapters).
However, listing query results in a certain order (a list of names in alphabetical order or a list of
years in numerical order) often comes in handy. SQL allows you to specify the order of results with the
ORDER BY clause.
The ORDER BY clause goes right at the end of the SELECT statement. It allows you to specify the column
or columns that determine the order of the results and whether the order is ascending (smallest to
largest) or descending (largest to smallest). For example, the following SQL statement displays a list of
film years, ordered from earliest to latest:
SELECT YearReleased
FROM Films
ORDER BY YearReleased;
Extracting Information
By default, ORDER BY sorts into ascending order, which is why the results of the preceding SQL sort
from lowest to highest number:
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