📄 que_125.htm
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<title>Ocp test </title>
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<b>QUESTION 125
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<p>Examine the description of the EMPLOYEES table: </p><table border="1" bordercolor="gray">
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<p><b>EMPLOYEES table: </b></p>
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<p><b>EMP_ID NUMBER(4) NOT NULL </b></p>
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<p><b>LAST_NAME VARCHAR2(30) NOT NULL </b></p>
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<p><b>FIRST_NAME VARCHAR2(30) </b></p>
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<p><b>DEPT_ID NUMBER(2) </b></p>
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<p>Which statement produces the number of different departments that have employees with last name Smith? </p><table border="1" bordercolor="gray" width="665">
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<p><b><input type="radio" name="AN" value="A"> A.</b></p>
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<p> SELECT COUNT(*) <br>FROM employees <br>WHERE last_name='Smith';
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<p><b><input type="radio" name="AN" value="B"> B.</b></p>
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<p> SELECT COUNT(dept_id) <br>FROM employees <br>WHERE last_name='Smith';
</p>
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<p><b><input type="radio" name="AN" value="C"> C.</b></p>
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<p> SELECT DISTINCT(COUNT(dept_id)) <br>FROM employees <br>WHERE last_name='Smith';
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<p><b><input type="radio" name="AN" value="D"> D.</b></p>
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<p> SELECT COUNT(DISTINCT dept_id) <br>FROM employees <br>WHERE last_name='Smith';
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<p><b><input type="radio" name="AN" value="E"> E.</b></p>
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<p> SELECT UNIQUE(dept_id) <br>FROM employees <br>WHERE last_name='Smith';</p>
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