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Post Info TOPIC: What is a SQL Queries and Subqueries?


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What is a SQL Queries and Subqueries?
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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 complete article at http://oracleonline.info/sql_queries.html


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