Oracle DBA Tutorial

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.. Read c...

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	sql sql tutorial What is a SQL Queries and Subqueries? (Preview)	SQL Tutorial	0	2749	Aug 18, 2009 by learnoracle
	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.. Read c...