createobjectoracle.html
来自「java类库详细讲解」· HTML 代码 · 共 191 行
HTML
191 行
<HTML>
<HEAD>
<META http-equiv="Content-Type" content="text/html; charset=UTF-8">
<TITLE>Creating an OBJECT Type in an Oracle Database
(Java Developers Almanac Example)
</TITLE>
<META CONTENT="Patrick Chan" NAME="AUTHOR">
<META CONTENT="Code Examples from The Java Developers Almanac 1.4" NAME="DESCRIPTION">
<META CONTENT="Addison-Wesley/Patrick Chan" NAME="OWNER">
<META CONTENT="3/20/02" NAME="revision">
<STYLE TYPE="text/css">
<!-- BODY CODE {font-family: Courier, Monospace; font-size: 11pt} TABLE, BODY {font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 10pt} PRE {font-family: Courier, Monospace; font-size: 10pt} H3 {font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 11pt} A.eglink {text-decoration: none} A:hover.eglink {text-decoration: underline} -->
</STYLE>
</HEAD>
<BODY>
<TABLE CELLSPACING="0" CELLPADDING="0" BORDER="0">
<TR>
<TD rowspan="3"><A HREF="/?l=ex"><IMG BORDER="0" ALIGN="BOTTOM" HSPACE="10" SRC="/egs/almanac14a.jpg"></A></TD><TD VALIGN="top"><font face="Times" size="6"><b>The Java Developers Almanac 1.4</b></font>
<br>
Order this book from <a href="/cgi-bin/scripts/redirect.pl?l=ex&url=http://www.amazon.com/exec/obidos/ASIN/0201752808/xeo">Amazon</a>.
</TD>
</TR>
<TR>
<TD align="right" valign="bottom">
<FORM method="get" action="/cgi-bin/search/find.pl">
<INPUT size="25" name="words" type="text"><INPUT value="Search" type="submit">
</FORM>
</TD>
</TR>
</TABLE>
<HR color="#6666cc">
<DIV ALIGN="LEFT">
<A HREF="/">Home</A>
>
<A HREF="../index.html">List of Packages</A>
>
<B><A HREF="../java.sql/pkg.html">java.sql</A></B><font color="#666666" SIZE="-2">
[73 examples]
</font>
>
<B><A HREF="../java.sql/pkg.html#Oracle%20OBJECTs">Oracle OBJECTs</A></B><font color="#666666" SIZE="-2">
[5 examples]
</font>
</DIV><P>
<h3>
e296.
Creating an OBJECT Type in an Oracle Database</h3>
In Oracle, you can define a composite data structure called an OBJECT,
which consists of one or more basic types. For example, you could
define an object called <code>book</code> with a title (VARCHAR) and an price
(NUMBER). An OBJECT can also contain other OBJECTs.
<P> This example creates two OBJECT types. <code>object2</code> contains two
fields --- a string and a number while <code>object1</code> also contains two
fields --- a string and a value of type <code>object2</code>.
<P> The example also creates a table to hold <code>object1</code> values. See
also <a href="../java.sql/InsertObjectOracle.html" class="eglink"><font size="-1"><b>e297</b> Inserting an OBJECT Value into an Oracle Table</font></a>.
<pre>
try {
// Create a statement
Statement stmt = <font color="#0066ff"><i>connection</i></font>.createStatement();
// Create the object2 type
stmt.execute("CREATE TYPE object2 AS OBJECT"
+ "(col_string2 VARCHAR(30), col_integer2 NUMBER)");
// Create the object1 type
stmt.execute("CREATE TYPE object1 AS OBJECT"
+ "(col_string1 VARCHAR(30), col_integer2 object2)");
// Create a table with a column to hold a number and the new object1 type
stmt.execute("CREATE TABLE object1_table(col_integer NUMBER, col_object1 object1)");
} catch (SQLException e) {
}
</pre>
<P><table width="600" CELLSPACING="0" CELLPADDING="2" BORDER="0">
<tr>
<td bgcolor="#6666cc" align="center"><font color="#ffffff">
Related Examples
</font></td>
</tr>
</table>
e297. <a class="eglink" href="InsertObjectOracle.html?l=rel">
Inserting an OBJECT Value into an Oracle Table
</a>
<br>
e298. <a class="eglink" href="InsertObjectOraclePreparedStatement.html?l=rel">
Inserting an OBJECT Value into an Oracle Table Using a Prepared Statement
</a>
<br>
e299. <a class="eglink" href="GetObjectOracle.html?l=rel">
Getting an OBJECT Value from an Oracle Table
</a>
<br>
e300. <a class="eglink" href="DropObjectOracle.html?l=rel">
Deleting an OBJECT Type from an Oracle Table
</a>
<br>
<table width="600" CELLSPACING="0" CELLPADDING="2" BORDER="0">
<tr>
<td align="left">
<br>
See also:
<a class="eglink" href="/egs/java.sql/pkg.html?l=rel#Batching">
Batching
</a>
<a class="eglink" href="/egs/java.sql/pkg.html?l=rel#Connections">
Connections
</a>
<a class="eglink" href="/egs/java.sql/pkg.html?l=rel#Database%20Meta%20Data">
Database Meta Data
</a>
<a class="eglink" href="/egs/java.sql/pkg.html?l=rel#Deleting%20Data">
Deleting Data
</a>
<a class="eglink" href="/egs/java.sql/pkg.html?l=rel#Drivers">
Drivers
</a>
<a class="eglink" href="/egs/java.sql/pkg.html?l=rel#Importing%20and%20Exporting">
Importing and Exporting
</a>
<a class="eglink" href="/egs/java.sql/pkg.html?l=rel#Inserting%20and%20Updating%20Data">
Inserting and Updating Data
</a>
<a class="eglink" href="/egs/java.sql/pkg.html?l=rel#Oracle%20VARRAYs">
Oracle VARRAYs
</a>
<a class="eglink" href="/egs/java.sql/pkg.html?l=rel#Procedures%20and%20Functions">
Procedures and Functions
</a>
<a class="eglink" href="/egs/java.sql/pkg.html?l=rel#Retrieving%20Data">
Retrieving Data
</a>
<a class="eglink" href="/egs/java.sql/pkg.html?l=rel#Scrollable%20Result%20Sets">
Scrollable Result Sets
</a>
<a class="eglink" href="/egs/java.sql/pkg.html?l=rel#Tables">
Tables
</a>
<a class="eglink" href="/egs/java.sql/pkg.html?l=rel#Updatable%20Result%20Sets">
Updatable Result Sets
</a>
</td>
</tr>
</table>
<br>
<br>
<FONT FACE="Verdana, Arial, Helvetica, sans-serif" SIZE="0">
© 2002 Addison-Wesley.
</FONT>
</BODY>
</HTML>
⌨️ 快捷键说明
复制代码Ctrl + C
搜索代码Ctrl + F
全屏模式F11
增大字号Ctrl + =
减小字号Ctrl + -
显示快捷键?