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<p><b><span style="font-size:22pt">Explaination 075: </span></b></p>
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This UPDATE statement is correct to receive desired results. Correct syntax is UPDATE table_name SET column_name1 = value, column_name2 = value2. You can also use the DEFAULT keyword to set a column value to its specified default value in update statements as well. <br>
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Incorrect Answers <br>
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A: You cannot use syntax like UPDATE table_name SET column_name1 = value AND column_name2 = value2. Correct syntax is UPDATE table_name SET column_name1 = value, column_name2 = value2. <br>
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B: You cannot use syntax like UPDATE table_name SET column_name1 = value AND column_name2 = value2. Correct syntax is UPDATE table_name SET column_name1 = value, column_name2 = value2. <br>
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D: Group function is not allowed to use in the SET clause of the UPDATE command. <br>
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E: You cannot set column to value DEFAULT OR NULL: this is wrong syntax to use. <br>
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OCP Introduction to Oracle 9i: SQL Exam Guide, Jason Couchman, p. 267-270 <br>
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Chapter 6: Manipulating Oracle Data
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