exp_145.htm
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<p><b><span style="font-size:22pt">Explaination 145: </span></b></p>
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use the double-ampersand if you want to reuse the variable value without prompting the user each time. <br>
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Incorrect answer : <br>
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A is not an error <br>
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B && will not prompt user for second time <br>
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D && will not ask the user for new value <br>
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Refer : Introduction to Oracle9i : SQL, Oracle University Study Guide, 7-13
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