Java How to Program, Early Objects, 11th Edition

24.4 SQL

We now discuss SQL in the context of our books database. You’ll be able to use the SQL discussed here in the examples later in the chapter. The next several subsections demonstrate SQL queries and statements using the SQL keywords in Fig. 24.10. Other SQL keywords are beyond this text’s scope.

SQL keyword	Description
SELECT	Retrieves data from one or more tables.
FROM	Tables involved in the query. Required in every SELECT.
WHERE	Criteria for selection that determine the rows to be retrieved, deleted or updated. Optional in a SQL statement.
GROUP BY	Criteria for grouping rows. Optional in a SELECT query.
ORDER BY	Criteria for ordering rows. Optional in a SELECT query.
INNER JOIN	Merge rows from multiple tables.