exp_081.htm

来自「oracle　DBA的资料」· HTM 代码 · 共 46 行

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<meta http-equiv="content-type" content="text/html; charset=gb2312">
<title>Ocp test </title>
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<p><b><span style="font-size:22pt">Explaination 081: &nbsp;</span></b></p>

<span style="font-size:18pt">
	<p>
	The query fails because the sub-query returns more than one row: it is possible situation when there are some customers with name Smith. <br>
	</p>

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

	<p>
	  A: The query fails because the sub-query returns more than one row <br>
	</p>

	<p>
	  B: The query fails because the sub-query returns more than one row <br>
	</p>

	<p>
	  C: The query fails because the sub-query returns more than one row <br>
	</p>

	<p>
	  E: The query fails because the sub-query returns more than one row, not because the outer query and the inner query are using different tables. <br>
	</p>

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

	<p>
	  Chapter 4: Subqueries
	</p>

</span>

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