📄 exp_010.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 010: </span></b></p>
<span style="font-size:18pt">
<p>
It is possible to apply COUNT() and MIN() functions on the column with DATE data type. <br>
</p>
<p>
Incorrect Answers <br>
</p>
<p>
A: Function SUM() cannot be used with DATE data type column. <br>
</p>
<p>
B: Function AVG() cannot be used with DATE data type column. <br>
</p>
<p>
D: Function AVG() cannot be used with DATE data type column. And function AVG() just has one parameter X, not two. It averages all X column values returned by the SELECT statement. <br>
</p>
<p>
F: There is no MAXIMUM() function in Oracle, only MAX() function exists. <br>
</p>
<p>
OCP Introduction to Oracle 9i: SQL Exam Guide, Jason Couchman, p. 81-85 <br>
</p>
<p>
Chapter 2: Limiting, Sorting, and Manipulating Return Data
</p>
</span>
</body>
</html>
<br>
⌨️ 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 + -