Java Reference
In-Depth Information
SELECT
AuthorID, FirstName, LastName
FROM
Authors
ORDER
BY
LastName, FirstName
sorts all the rows in ascending order by last name, then by first name. If any rows have the
same last-name value, they're returned sorted by first name (Fig. 24.17).
AuthorID
FirstName
LastName
3
Abbey
Deitel
2
Harvey
Deitel
1
Paul
Deitel
5
Michael
Morgano
4
Dan
Quirk
Fig. 24.17
|
Sample data from
Authors
in ascending order by
LastName
and
FirstName
.
Combining the
WHERE
and
ORDER
BY
Clauses
The
WHERE
and
ORDER
BY
clauses can be combined in one query, as in
SELECT
ISBN, Title, EditionNumber, Copyright
FROM
Titles
WHERE
Title
LIKE
'%How to Program'
ORDER BY
Title
ASC
which returns the
ISBN
,
Title
,
EditionNumber
and
Copyright
of each book in the
Titles
table that has a
Title
ending with
"How
to
Program"
and sorts them in ascending order
by
Title
. The query results are shown in Fig. 24.18.
ISBN
Title
EditionNumber
Copyright
0133764036
Android How to Program
2
2015
013299044X
C How to Program
7
2013
0133378713
C++ How to Program
9
2014
0132151006
Internet & World Wide Web How to Program
5
2012
0133807800
Java How to Program
10
2015
0133406954
Visual Basic 2012 How to Program
6
2014
0133379337
Visual C# 2012 How to Program
5
2014
0136151574
Visual C++ 2008 How to Program
2
2008
Fig. 24.18
|
Sampling of books from table
Titles
whose titles end with
How
to
Program
in
ascending order by
Title
.
Database designers often split related data into separate tables to ensure that a database does
not store data redundantly. For example, in the
books
database, we use an
AuthorISBN
table
to store the relationship data between authors and their corresponding titles. If we did not
separate this information into individual tables, we'd need to include author information
with each entry in the
Titles
table. This would result in the database's storing
duplicate
au-
