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<p><b><span style="font-size:22pt">Explaination 061: </span></b></p>
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These statements provide correct syntax and semantics to show the number of customers. <br>
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Function COUNT() can be used with substitution symbol of all columns "*" or just with one column name. Last query will be processed a little bit faster. <br>
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Incorrect Answers <br>
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A: There is no TOTAL() function in Oracle. <br>
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C: There is no TOTAL() function in Oracle. <br>
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E: You cannot table name as a parameter of COUNT() function. <br>
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F: There is no TOTAL() function in Oracle. <br>
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OCP Introduction to Oracle 9i: SQL Exam Guide, Jason Couchman, p. 123-125 <br>
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Chapter 3: Advanced Data Selection in Oracle
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