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<title>第十三章 数据库编程基础</title>
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<div class=B style='mso-line-spacing:"120 20 0";mso-margin-left-alt:0;
position:absolute;top:7.5%;left:9.36%;width:87.26%;height:7.0%'><span
style='mso-special-format:nobullet;display:none'>•</span><span lang=EN-US
style='font-family:宋体;mso-ascii-font-family:宋体;font-size:113%;mso-fareast-language:
ZH-CN'><b>13.4 SQL</b></span><span style='font-family:黑体;mso-ascii-font-family:
宋体;mso-fareast-font-family:黑体;font-size:113%'><b>简介 </b></span></div>
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position:absolute;top:18.75%;left:9.36%;width:87.26%;height:7.0%'><span
style='mso-special-format:nobullet;display:none'>•</span><span
style='font-family:黑体;mso-fareast-font-family:黑体;font-size:113%;display:none'><b> </b></span></div>
<div class=B style='mso-line-spacing:"120 20 0";mso-margin-left-alt:0;
position:absolute;top:28.24%;left:9.36%;width:87.26%;height:5.25%'><span
style='mso-special-format:nobullet;display:none'>•</span><span lang=EN-US
style='font-size:75%;mso-fareast-language:ZH-CN'><b>SQL</b></span><span
style='font-family:宋体;mso-ascii-font-family:宋体;mso-fareast-font-family:宋体;
font-size:75%'><b>概述</b></span><span style='font-size:75%'><b> </b></span></div>
<div class=B style='mso-line-spacing:"120 20 0";mso-margin-left-alt:0'><span
style='position:absolute;top:35.75%;left:9.36%;width:104.68%;height:5.25%'><span
style='mso-special-format:nobullet;display:none'>•</span><span
style='font-size:75%'><b><span
style='mso-spacerun:yes'> </span></b></span><span
style='font-family:宋体;mso-fareast-font-family:宋体;font-size:75%'><b>结构化查询语言</b></span><span
lang=EN-US style='font-size:75%;mso-fareast-language:ZH-CN'><b>SQL</b></span><span
style='font-family:宋体;mso-fareast-font-family:宋体;font-size:75%'><b>是操作数据库的工业标准语言。在</b></span></span><span
style='position:absolute;top:42.0%;left:9.36%;width:104.68%;height:5.25%'><span
lang=EN-US style='font-size:75%;mso-fareast-language:ZH-CN'><b>SQL</b></span><span
style='font-family:宋体;mso-fareast-font-family:宋体;font-size:75%'><b>语言中，指定要做什么而不是怎么做。只要告诉</b></span><span
lang=EN-US style='font-size:75%;mso-fareast-language:ZH-CN'><b>SQL</b></span><span
style='font-family:宋体;mso-fareast-font-family:宋体;font-size:75%'><b>需</b></span></span><span
style='position:absolute;top:49.0%;left:9.36%;width:104.68%;height:4.75%'><span
style='font-family:宋体;mso-fareast-font-family:宋体;font-size:75%'><b>要数据库做什么，可以确切指定想要检索的记录以及按什么</b></span></span><span
style='position:absolute;top:54.75%;left:9.36%;width:104.68%;height:5.25%'><span
style='font-family:宋体;mso-fareast-font-family:宋体;font-size:75%'><b>顺序检索。可以在设计或运行时对数据控件使用</b></span><span
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