exp_017.htm

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<p><b><span style="font-size:22pt">Explaination 017: &nbsp;</span></b></p>


	<p>
	<span style="font-size:18pt">This statement provides correct syntax to define the FOREIGN KEY constraint on the DEPTNO column of the EMP table. <br>
	</span></p>

	<p>
	  <span style="font-size:18pt">Incorrect Answers<br>
	</span></p>

	<p>
	  <span style="font-size:18pt">A: There is incorrect syntax, because list of columns and column for the constraint need to be surrounded with the brackets. <br>
	</span></p>

	<p>
	  <span style="font-size:18pt">C: It is incorrect to use FOREIGN KEY keywords to define constraint on the table.It can be used to add integrity constraint to existing table. <br>
	</span></p>

	<p>
	  <span style="font-size:18pt">D: It is incorrect to use FOREIGN KEY keywords to define constraint on the table. It can be used to add integrity constraint to existing table. <br>
	</span></p>

	<p>
	  <span style="font-size:18pt">OCP Introduction to Oracle 9i: SQL Exam Guide, Jason Couchman, p. 238-245 <br>
	</span></p>

	<p>
	  <span style="font-size:18pt">Chapter 5: Creating Oracle Database Object
	</span></p>

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