|Oracle9i SQL Reference
Release 2 (9.2)
Part Number A96540-01
SQL Queries and Subqueries, 2 of 11
A query is an operation that retrieves data from one or more tables or views. In this reference, a top-level
SELECT statement is called a query, and a query nested within another SQL statement is called a subquery.
This section describes some types of queries and subqueries and how to use them. The top level of the syntax is shown in this chapter.
SELECT for the full syntax of all the clauses and the semantics of the keywords and parameters