📄 que_141.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 align="left" color="black" style="font-size:16pt;">
<b>QUESTION 141
</b></p><hr color="#99CCFF">
<p>Examine the SQL statement that creates ORDERS table: </p><p>CREATE TABLE orders (SER_NO NUMBER UNIQUE, <br>
ORDER_ID NUMBER,
<br> ORDER_DATE DATE NOT NULL, <br>
STATUS VARCHAR2(10) <br>
CHECK (status IN
('CREDIT', 'CASH')), <br> PROD_ID NUMBER REFERENCES PRODUCTS(PRODUCT_ID),<br>
ORD_TOTAL NUMBER, <br>
PRIMARY KEY (order_id, order_date));
<br>For which columns would an index be automatically created when you execute the above
SQL statement? (Choose two.) </p><table border="1" bordercolor="gray" width="665">
<form name="youAnsForm">
<span style="font-size:18pt;">
<tr>
<td align="center" width="89">
<p><b><input type="checkbox" name="AN" value="A"> A.</b></p>
</td>
<td align="left" width="566">
<p> SER_NO
</p>
</td>
</tr>
<tr>
<td align="center" width="89">
<p><b><input type="checkbox" name="AN" value="B"> B.</b></p>
</td>
<td align="left" width="566">
<p> ORDER_ID
</p>
</td>
</tr>
<tr>
<td align="center" width="89">
<p><b><input type="checkbox" name="AN" value="C"> C.</b></p>
</td>
<td align="left" width="566">
<p> STATUS
</p>
</td>
</tr>
<tr>
<td align="center" width="89">
<p><b><input type="checkbox" name="AN" value="D"> D.</b></p>
</td>
<td align="left" width="566">
<p> PROD_ID
</p>
</td>
</tr>
<tr>
<td align="center" width="89">
<p><b><input type="checkbox" name="AN" value="E"> E.</b></p>
</td>
<td align="left" width="566">
<p> ORD_TOTAL
</p>
</td>
</tr>
<tr>
<td align="center" width="89">
<p><b><input type="checkbox" name="AN" value="F"> F.</b></p>
</td>
<td align="left" width="566">
<p> composite index on ORDER_ID and ORDER_DATE</p>
</td>
</tr>
</span>
</form>
</table>
</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 + -