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<p><b><span style="font-size:22pt">Explaination 079: &nbsp;</span></b></p>

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	<p>
	Only NOT IN operator can be used with a multi-row sub-query. All others may be used with single-row sub-query only. <br>
	</p>

	<p>
	  Incorrect Answers <br>
	</p>

	<p>
	  A: When sub-queries are linked to the parent by equality comparisons, the parent query expects only one row of data from the sub-query, so "=" operator cannot be used with a multiple-row sub-query. <br>
	</p>

	<p>
	  B: Operator LIKE will work only with single-row sub-queries. <br>
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	<p>
	  C: Operator BETWEEN will not work with a multi-row sub-queries. <br>
	</p>

	<p>
	  E: Operator LIKE is used only for single-row sub-queries. <br>
	</p>

	<p>
	  F: When sub-queries are linked to the parent by equality comparisons, the parent query expects only one row of data from the sub-query, so "<>" operator cannot be used with a multiple-row sub-query. <br>
	</p>

	<p>
	  OCP Introduction to Oracle 9i: SQL Exam Guide, Jason Couchman, p. 150-165 <br>
	</p>

	<p>
	  Chapter 4: Subqueries
	</p>

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