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<p><b><span style="font-size:22pt">Explaination 130: &nbsp;</span></b></p>

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	ALTER TABLE table_name <br>
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	  ADD [CONSTRAINT constraint] type (coloumn); <br>
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	  Incorrect answer : <br>
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	  A wrong syntax <br>
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	  B wrong syntax <br>
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	  C wrong syntax <br>
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	  E no such MODIFY keyword <br>
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	  Refer : Introduction to Oracle9i : SQL, Oracle University Study Guide, 10-17
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