📄 slide0067.htm

📁 可作为课程设计或者毕业设计也可以作为学校精品课程网站使用
💻 HTM
字号:
<html xmlns:v="urn:schemas-microsoft-com:vml"
xmlns:o="urn:schemas-microsoft-com:office:office"
xmlns:p="urn:schemas-microsoft-com:office:powerpoint"
xmlns:oa="urn:schemas-microsoft-com:office:activation"
xmlns="http://www.w3.org/TR/REC-html40">

<head>
<meta http-equiv=Content-Type content="text/html; charset=gb2312">
<meta name=ProgId content=PowerPoint.Slide>
<meta name=Generator content="Microsoft PowerPoint 11">
<link id=Main-File rel=Main-File href="../z13.htm">
<link rel=Preview href=preview.wmf>
<!--[if !mso]>
<style>
v\:* {behavior:url(#default#VML);}
o\:* {behavior:url(#default#VML);}
p\:* {behavior:url(#default#VML);}
.shape {behavior:url(#default#VML);}
v\:textbox {display:none;}
</style>
<![endif]-->
<title>第十三章  数据库编程基础</title>
<meta name=Description content=2008-3-24>
<link rel=Stylesheet href="master08_stylesheet.css">
<![if !ppt]>
<style media=print>
<!--.sld
	{left:0px !important;
	width:6.0in !important;
	height:4.5in !important;
	font-size:107% !important;}
-->
</style>
<script src=script.js></script><script><!--
if( !IsNts() ) Redirect( "PPTSld" );
//--></script><!--[if vml]><script>g_vml = 1;
</script><![endif]--><![endif]><o:shapelayout v:ext="edit">
 <o:idmap v:ext="edit" data="92"/>
</o:shapelayout>
</head>

<body lang=ZH-CN style='margin:0px;background-color:black'
onclick="DocumentOnClick()" onresize="_RSW()" onload="LoadSld()"
onkeypress="_KPH()">

<div id=SlideObj class=sld style='position:absolute;top:0px;left:0px;
width:534px;height:400px;font-size:16px;background-color:#E3DDBB;background-image:
url("master08_image001.jpg");clip:rect(0%, 101%, 101%, 0%);visibility:hidden'><p:slide
 coordsize="720,540"
 colors="#ffffff,#000000,#808080,#482400,#dfd6c3,#d69b80,#993300,#666600"
 masterhref="master08.xml">
 <p:shaperange href="master08.xml#_x0000_s124929"/><![if !ppt]><p:shaperange
  href="master08.xml#_x0000_s124930"/><![if !vml]><img border=0
 v:shapes="_x0000_s124930" src="master08_image003.jpg" style='position:absolute;
 top:0%;left:0%;width:7.49%;height:100.0%'><![endif]><p:shaperange
  href="master08.xml#_x0000_s124932"/><p:shaperange
  href="master08.xml#_x0000_s124933"/><![endif]><v:shapetype id="_x0000_t202"
  coordsize="21600,21600" o:spt="202" path="m,l,21600r21600,l21600,xe">
  <v:stroke joinstyle="miter"/>
  <v:path gradientshapeok="t" o:connecttype="rect"/>
 </v:shapetype><v:shape id="_x0000_s94212" type="#_x0000_t202" style='position:absolute;
  left:60pt;top:18pt;width:9in;height:481.625pt;mso-wrap-distance-left:0;
  mso-wrap-distance-right:0' filled="f" fillcolor="#dfd6c3 [4]" stroked="f"
  strokecolor="black [1]">
  <v:shadow color="gray [2]"/>
  <v:textbox style='mso-fit-shape-to-text:t'/>
 </v:shape>
 <div v:shape="_x0000_s94212" class=O>
 <div style='text-align:justify;mso-line-spacing:"100 50 0";position:absolute;
 top:4.25%;left:9.36%;width:22.84%;height:5.25%'><nobr><span lang=EN-US
 style='font-family:"Times New Roman";mso-ascii-font-family:"Times New Roman";
 mso-fareast-font-family:"Arial Unicode MS";color:red;mso-fareast-language:
 ZH-CN'><b>1</b></span><span style='font-family:"Arial Unicode MS";mso-fareast-font-family:
 "Arial Unicode MS";color:red'><b>．</b></span><span style='mso-bidi-font-family:
 "Times New Roman";color:red'><b> </b></span><span style='font-family:宋体;
 mso-ascii-font-family:宋体;mso-fareast-font-family:宋体;color:red'><b>关系（表）</b></span><span
 style='font-family:"Arial Unicode MS";mso-fareast-font-family:"Arial Unicode MS";
 color:red;display:none'><b>&#13;</b></span></nobr></div>
 <div style='text-align:justify;mso-line-spacing:"100 50 0";position:absolute;
 top:12.75%;left:9.36%;width:88.2%;height:10.0%'><span style='font-family:宋体;
 mso-ascii-font-family:宋体'><b><span style='mso-spacerun:yes'>&nbsp;&nbsp;&nbsp;
 </span>在关系数据库中，数据以关系的形式出现，可以把关系理解成一张二维表（</b></span><span lang=EN-US
 style='font-family:"Times New Roman";mso-ascii-font-family:"Times New Roman";
 mso-fareast-font-family:"Arial Unicode MS";mso-fareast-language:ZH-CN'><b>Table</b></span><span
 style='font-family:宋体;mso-ascii-font-family:宋体;mso-fareast-font-family:宋体'><b>）。&#13;</b></span></div>
 <div style='text-align:justify;mso-line-spacing:"100 50 0";position:absolute;
 top:25.75%;left:9.36%;width:23.59%;height:5.25%'><nobr><span lang=EN-US
 style='font-family:"Times New Roman";mso-ascii-font-family:"Times New Roman";
 mso-fareast-font-family:"Arial Unicode MS";color:red;mso-fareast-language:
 ZH-CN'><b>2</b></span><span style='font-family:"Arial Unicode MS";mso-fareast-font-family:
 "Arial Unicode MS";color:red'><b>．</b></span><span style='font-family:"Times New Roman";
 mso-fareast-font-family:"Arial Unicode MS";mso-hansi-font-family:"Times New Roman";
 color:red'><b>&nbsp;</b></span><span style='font-family:"Times New Roman";
 mso-ascii-font-family:"Times New Roman";mso-fareast-font-family:"Arial Unicode MS";
 color:red'><b> </b></span><span style='font-family:"Arial Unicode MS";
 mso-fareast-font-family:"Arial Unicode MS";color:red'><b>记录（行）&#13;</b></span></nobr></div>
 <div style='text-align:justify;mso-line-spacing:"100 50 0";position:absolute;
 top:34.0%;left:9.36%;width:88.2%;height:10.0%'><span style='font-family:宋体;
 mso-ascii-font-family:宋体;mso-fareast-font-family:宋体'><b>每张二维表均由若干行和列构成，其中每一行称为一条记录（</b></span><span
 lang=EN-US style='font-family:"Times New Roman";mso-ascii-font-family:"Times New Roman";
 mso-fareast-font-family:"Arial Unicode MS";mso-fareast-language:ZH-CN'><b>Record</b></span><span
 style='font-family:宋体;mso-ascii-font-family:宋体;mso-fareast-font-family:宋体'><b>），&#13;</b></span></div>
 <div style='text-align:justify;mso-line-spacing:"100 50 0";position:absolute;
 top:47.0%;left:9.36%;width:23.59%;height:5.25%'><nobr><span lang=EN-US
 style='font-family:"Times New Roman";mso-ascii-font-family:"Times New Roman";
 mso-fareast-font-family:"Arial Unicode MS";color:red;mso-fareast-language:
 ZH-CN'><b>3</b></span><span style='font-family:"Arial Unicode MS";mso-fareast-font-family:
 "Arial Unicode MS";color:red'><b>．</b></span><span style='font-family:"Times New Roman";
 mso-fareast-font-family:"Arial Unicode MS";mso-hansi-font-family:"Times New Roman";
 color:red'><b>&nbsp;</b></span><span style='font-family:"Times New Roman";
 mso-ascii-font-family:"Times New Roman";mso-fareast-font-family:"Arial Unicode MS";
 color:red'><b> </b></span><span style='font-family:"Arial Unicode MS";
 mso-fareast-font-family:"Arial Unicode MS";color:red'><b>字段（列）&#13;</b></span></nobr></div>
 <div style='text-align:justify;mso-line-spacing:"100 50 0";position:absolute;
 top:55.0%;left:9.36%;width:88.2%;height:10.5%'><span style='font-family:宋体;
 mso-ascii-font-family:宋体;mso-fareast-font-family:宋体'><b>二维表中的每一列称为一个字段（</b></span><span
 lang=EN-US style='font-family:"Times New Roman";mso-ascii-font-family:"Times New Roman";
 mso-fareast-font-family:"Arial Unicode MS";mso-fareast-language:ZH-CN'><b>Field</b></span><span
 style='font-family:宋体;mso-ascii-font-family:宋体;mso-fareast-font-family:宋体'><b>），每一列均有一个名字，称为字段名，各字段名互不相同。&#13;</b></span></div>
 <div style='text-align:justify;mso-line-spacing:"100 50 0";position:absolute;
 top:68.25%;left:9.36%;width:13.48%;height:5.25%'><nobr><span lang=EN-US
 style='font-family:"Times New Roman";mso-ascii-font-family:"Times New Roman";
 mso-fareast-font-family:"Arial Unicode MS";color:red;mso-fareast-language:
 ZH-CN'><b>4</b></span><span style='font-family:"Arial Unicode MS";mso-fareast-font-family:
 "Arial Unicode MS";color:red'><b>．</b></span><span style='font-family:"Times New Roman";
 mso-fareast-font-family:"Arial Unicode MS";mso-hansi-font-family:"Times New Roman";
 color:red'><b>&nbsp;</b></span><span style='font-family:"Times New Roman";
 mso-ascii-font-family:"Times New Roman";mso-fareast-font-family:"Arial Unicode MS";
 color:red'><b> </b></span><span style='font-family:"Arial Unicode MS";
 mso-fareast-font-family:"Arial Unicode MS";color:red'><b>主键&#13;</b></span></nobr></div>
 <div style='text-align:justify;mso-line-spacing:"100 50 0";position:absolute;
 top:76.75%;left:9.36%;width:88.2%;height:15.25%'><span style='font-family:
 宋体;mso-ascii-font-family:宋体;mso-fareast-font-family:宋体'><b>关系数据库中的某个字段或某些字段的组合定义为主键（</b></span><span
 lang=EN-US style='font-family:"Times New Roman";mso-ascii-font-family:"Times New Roman";
 mso-fareast-font-family:"Arial Unicode MS";mso-fareast-language:ZH-CN'><b>Primary
 Key</b></span><span style='font-family:宋体;mso-ascii-font-family:宋体;mso-fareast-font-family:
 宋体'><b>）。每条记录的主键值都是唯一的，这就保证了可以通过主键唯一标识一条记录。</b></span><span style='font-family:
 "Arial Unicode MS";mso-fareast-font-family:"Arial Unicode MS";mso-special-format:
 lastCR;display:none'><b>&#13;</b></span></div>
 </div>
</p:slide></div>

</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 + -