📄 exp_035.htm
字号:
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=gb2312">
<title>Ocp test </title>
</head>
<body bgcolor="white" text="black" link="blue" vlink="purple" alink="red">
<p><b><span style="font-size:22pt">Explaination 035: </span></b></p>
<p>
<span style="font-size:18pt">Statement in this answer will show correct result, using function AVG(). This function takes
the values for a single column on all rows returned by the query and calculates the average value for that column. <br>
</span></p>
<p>
<span style="font-size:18pt">Incorrect Answers <br>
</span></p>
<p>
<span style="font-size:18pt">A: There is no AVERAGE() function in Oracle. <br>
</span></p>
<p>
<span style="font-size:18pt">B: COUNT() will calculate number of row, not an average grade point. <br>
</span></p>
<p>
<span style="font-size:18pt">C: MIN() function will calculate minimum grade for all students enrolled during semesters that end in the year 2000. <br>
</span></p>
<p>
<span style="font-size:18pt">E: SUM() will calculate sum of all grade points for all students enrolled during semesters that
end in the year 2000. <br>
</span></p>
<p>
<span style="font-size:18pt">F: There is no MEDIAN() function in Oracle. <br>
</span></p>
<p>
<span style="font-size:18pt">OCP Introduction to Oracle 9i: SQL Exam Guide, Jason Couchman, p. 123-125 <br>
</span></p>
<p>
<span style="font-size:18pt">Chapter 3: Advanced Data Selection in Oracle
</span></p>
<br>
</body>
</html>
⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -