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发表于 2005-7-5 10:00:43 | 显示全部楼层 |阅读模式

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< class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><FONT size=3><SPAN lang=EN-US><SPAN style="mso-tab-count: 1">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: &#39;Times New Roman&#39;; mso-hansi-font-family: &#39;Times New Roman&#39;">有了</SPAN><SPAN lang=EN-US>SQL</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: &#39;Times New Roman&#39;; mso-hansi-font-family: &#39;Times New Roman&#39;">基础,本章开始讲解一些</SPAN><SPAN lang=EN-US>SQL</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: &#39;Times New Roman&#39;; mso-hansi-font-family: &#39;Times New Roman&#39;">的高级应用。包括如何创建数据库、表、索引,视图、存储过程、触发器、游标的简单应用等,同时本章也讲解一些能有效提高维护效率的</SPAN><SPAN lang=EN-US>SQL</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: &#39;Times New Roman&#39;; mso-hansi-font-family: &#39;Times New Roman&#39;">知识:系统存储过程、系统表的应用。</SPAN></FONT></P>< class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US><FONT size=3>&nbsp;<?xml:namespace prefix = o ns = "urn:schemas-microsoft-comfficeffice" /><o:p></o:p></FONT></SPAN></P>< class=MsoHeading8 style="MARGIN: 12pt 0cm 3.2pt"><A name=_Toc105209367></A><A name=_Toc105209462></A><A name=_Toc105209592><SPAN style="mso-bookmark: _Toc105209462"><SPAN style="mso-bookmark: _Toc105209367"><STRONG><FONT size=3><FONT face=宋体><SPAN class=MsoHyperlink><SPAN style="COLOR: black; TEXT-DECORATION: none; text-underline: none"><U>第一节<SPAN lang=EN-US><SPAN style="mso-spacerun: yes">&nbsp; </SPAN></SPAN></U></SPAN></SPAN>创建、删除数据库和表</FONT></FONT></STRONG></SPAN></SPAN></A></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US style="COLOR: black"><FONT size=3>&nbsp;<o:p></o:p></FONT></SPAN></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><FONT size=3><B><SPAN lang=EN-US>1.1<SPAN style="mso-tab-count: 1">&nbsp;&nbsp; </SPAN></SPAN></B><B><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: &#39;Times New Roman&#39;; mso-hansi-font-family: &#39;Times New Roman&#39;">创建、删除数据库的</SPAN><SPAN lang=EN-US>SQL</SPAN></B><B><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: &#39;Times New Roman&#39;; mso-hansi-font-family: &#39;Times New Roman&#39;">语法</SPAN><SPAN lang=EN-US><o:p></o:p></SPAN></B></FONT></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><FONT size=3><SPAN lang=EN-US><SPAN style="mso-tab-count: 1">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: &#39;Times New Roman&#39;; mso-hansi-font-family: &#39;Times New Roman&#39;">创建数据库的语法:</SPAN><B><SPAN lang=EN-US>create database</SPAN></B><SPAN lang=EN-US> </SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: &#39;Times New Roman&#39;; mso-hansi-font-family: &#39;Times New Roman&#39;">数据库名</SPAN></FONT></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><FONT size=3><SPAN lang=EN-US><SPAN style="mso-tab-count: 1">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: &#39;Times New Roman&#39;; mso-hansi-font-family: &#39;Times New Roman&#39;">在查询分析器中写:</SPAN><B><SPAN lang=EN-US>Create Database</SPAN></B><SPAN lang=EN-US> testData</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: &#39;Times New Roman&#39;; mso-hansi-font-family: &#39;Times New Roman&#39;">,选中该语句,按</SPAN><SPAN lang=EN-US>F5</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: &#39;Times New Roman&#39;; mso-hansi-font-family: &#39;Times New Roman&#39;">执行,创建了一个名字为</SPAN><SPAN lang=EN-US>testData</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: &#39;Times New Roman&#39;; mso-hansi-font-family: &#39;Times New Roman&#39;">的数据库。</SPAN></FONT></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><FONT size=3><SPAN lang=EN-US><SPAN style="mso-tab-count: 1">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: &#39;Times New Roman&#39;; mso-hansi-font-family: &#39;Times New Roman&#39;">删除数据库的语法:</SPAN><B><SPAN lang=EN-US>drop database</SPAN></B><SPAN lang=EN-US> </SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: &#39;Times New Roman&#39;; mso-hansi-font-family: &#39;Times New Roman&#39;">数据库名</SPAN></FONT></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><FONT size=3><SPAN lang=EN-US><SPAN style="mso-tab-count: 1">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: &#39;Times New Roman&#39;; mso-hansi-font-family: &#39;Times New Roman&#39;">在查询分析器中写:</SPAN><B><SPAN lang=EN-US>Drop Database</SPAN></B><SPAN lang=EN-US> testData</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: &#39;Times New Roman&#39;; mso-hansi-font-family: &#39;Times New Roman&#39;">,选中该语句,按</SPAN><SPAN lang=EN-US>F5</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: &#39;Times New Roman&#39;; mso-hansi-font-family: &#39;Times New Roman&#39;">执行,删除名字为</SPAN><SPAN lang=EN-US>testData</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: &#39;Times New Roman&#39;; mso-hansi-font-family: &#39;Times New Roman&#39;">的数据库。</SPAN></FONT></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US><FONT size=3>&nbsp;<o:p></o:p></FONT></SPAN></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><FONT size=3><B><SPAN lang=EN-US>1.2<SPAN style="mso-tab-count: 1">&nbsp;&nbsp; </SPAN></SPAN></B><B><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: &#39;Times New Roman&#39;; mso-hansi-font-family: &#39;Times New Roman&#39;">创建、修改、删除数据库中表的</SPAN><SPAN lang=EN-US>SQL</SPAN></B><B><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: &#39;Times New Roman&#39;; mso-hansi-font-family: &#39;Times New Roman&#39;">语法</SPAN></B></FONT></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><FONT size=3><SPAN lang=EN-US><SPAN style="mso-tab-count: 1">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: &#39;Times New Roman&#39;; mso-hansi-font-family: &#39;Times New Roman&#39;">创建表的语法:</SPAN><B><SPAN lang=EN-US>create table</SPAN></B><SPAN lang=EN-US> </SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: &#39;Times New Roman&#39;; mso-hansi-font-family: &#39;Times New Roman&#39;">表名</SPAN></FONT></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US><FONT size=3><SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>(</FONT></SPAN></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><FONT size=3><SPAN lang=EN-US><SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: &#39;Times New Roman&#39;; mso-hansi-font-family: &#39;Times New Roman&#39;">列名</SPAN><SPAN lang=EN-US>1 </SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: &#39;Times New Roman&#39;; mso-hansi-font-family: &#39;Times New Roman&#39;">数据类型</SPAN><SPAN lang=EN-US>(</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: &#39;Times New Roman&#39;; mso-hansi-font-family: &#39;Times New Roman&#39;">长度</SPAN><SPAN lang=EN-US>) not NULL [NULL],</SPAN></FONT></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><FONT size=3><SPAN lang=EN-US><SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: &#39;Times New Roman&#39;; mso-hansi-font-family: &#39;Times New Roman&#39;">列名</SPAN><SPAN lang=EN-US>2 </SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: &#39;Times New Roman&#39;; mso-hansi-font-family: &#39;Times New Roman&#39;">数据类型</SPAN><SPAN lang=EN-US>(</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: &#39;Times New Roman&#39;; mso-hansi-font-family: &#39;Times New Roman&#39;">长度</SPAN><SPAN lang=EN-US>) not NULL [NULL],</SPAN></FONT></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US><FONT size=3><SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>................</FONT></SPAN></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US><FONT size=3><SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>)</FONT></SPAN></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><FONT size=3><SPAN lang=EN-US><SPAN style="mso-tab-count: 1">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: &#39;Times New Roman&#39;; mso-hansi-font-family: &#39;Times New Roman&#39;">在查询分析器中写:</SPAN></FONT></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US><FONT size=3><SPAN style="mso-tab-count: 2">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN><B>use</B> testData</FONT></SPAN></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt 21pt; TEXT-INDENT: 21pt"><FONT size=3><B><SPAN lang=EN-US>Create table</SPAN></B><SPAN lang=EN-US> testTable1</SPAN></FONT></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt 21pt; TEXT-INDENT: 21pt"><SPAN lang=EN-US><FONT size=3>(</FONT></SPAN></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt 21pt; TEXT-INDENT: 21pt"><SPAN lang=EN-US><FONT size=3><SPAN style="mso-tab-count: 1">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>id int,</FONT></SPAN></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt 21pt; TEXT-INDENT: 21pt"><SPAN lang=EN-US><FONT size=3><SPAN style="mso-tab-count: 1">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>name varchar(20)</FONT></SPAN></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt 21pt; TEXT-INDENT: 21pt"><SPAN lang=EN-US><FONT size=3>)</FONT></SPAN></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt 21pt; TEXT-INDENT: 21pt"><FONT size=3><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: &#39;Times New Roman&#39;; mso-hansi-font-family: &#39;Times New Roman&#39;">选中上面的</SPAN><SPAN lang=EN-US>SQL</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: &#39;Times New Roman&#39;; mso-hansi-font-family: &#39;Times New Roman&#39;">语句,按</SPAN><SPAN lang=EN-US>F5</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: &#39;Times New Roman&#39;; mso-hansi-font-family: &#39;Times New Roman&#39;">执行,创建一个名字为</SPAN><SPAN lang=EN-US>testTable1</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: &#39;Times New Roman&#39;; mso-hansi-font-family: &#39;Times New Roman&#39;">的表。</SPAN></FONT></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><FONT size=3><SPAN lang=EN-US><SPAN style="mso-tab-count: 1">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: &#39;Times New Roman&#39;; mso-hansi-font-family: &#39;Times New Roman&#39;">修改表的关键字是:</SPAN><B><SPAN lang=EN-US>Alter table</SPAN></B><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: &#39;Times New Roman&#39;; mso-hansi-font-family: &#39;Times New Roman&#39;">(其后可能跟随</SPAN><CODE><SPAN lang=EN-US style="FONT-FAMILY: 宋体; mso-ansi-font-size: 10.5pt">ALTER COLUMN、ADD、DROP COLUMN等</SPAN></CODE><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: &#39;Times New Roman&#39;; mso-hansi-font-family: &#39;Times New Roman&#39;">),具体语法可到</SPAN><SPAN lang=EN-US>SQLServer</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: &#39;Times New Roman&#39;; mso-hansi-font-family: &#39;Times New Roman&#39;">联机帮助中查询。</SPAN></FONT></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><FONT size=3><SPAN lang=EN-US><SPAN style="mso-tab-count: 1">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: &#39;Times New Roman&#39;; mso-hansi-font-family: &#39;Times New Roman&#39;">删除表的语法:</SPAN><B><SPAN lang=EN-US>Drop table </SPAN></B><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: &#39;Times New Roman&#39;; mso-hansi-font-family: &#39;Times New Roman&#39;">表名(可以一次性删除多个表</SPAN><SPAN lang=EN-US>,</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: &#39;Times New Roman&#39;; mso-hansi-font-family: &#39;Times New Roman&#39;">表名和表名之间用逗号隔开)。</SPAN></FONT></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><FONT size=3><SPAN lang=EN-US><SPAN style="mso-tab-count: 1">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: &#39;Times New Roman&#39;; mso-hansi-font-family: &#39;Times New Roman&#39;">在查询分析器中写:</SPAN><SPAN lang=EN-US>Drop table testTable1</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: &#39;Times New Roman&#39;; mso-hansi-font-family: &#39;Times New Roman&#39;">,选中该语句,按</SPAN><SPAN lang=EN-US>F5</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: &#39;Times New Roman&#39;; mso-hansi-font-family: &#39;Times New Roman&#39;">执行,删除名字为</SPAN><SPAN lang=EN-US>testTable1</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: &#39;Times New Roman&#39;; mso-hansi-font-family: &#39;Times New Roman&#39;">的表。</SPAN></FONT></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US><FONT size=3>&nbsp;<o:p></o:p></FONT></SPAN></P><P class=MsoHeading8 style="MARGIN: 12pt 0cm 3.2pt 42pt; TEXT-INDENT: -42pt; mso-list: l14 level1 lfo14; tab-stops: list 42.0pt"><A name=_Toc105209368></A><A name=_Toc105209463></A><A name=_Toc105209593><SPAN style="mso-bookmark: _Toc105209463"><SPAN style="mso-bookmark: _Toc105209368"><SPAN lang=EN-US><STRONG><FONT face=宋体 size=3>第二节</FONT></STRONG><SPAN style="FONT: 7pt &#39;Times New Roman&#39;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN></SPAN><STRONG><FONT face=宋体 size=3>创建视图和索引</FONT></STRONG></SPAN></SPAN></A></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt 21pt"><SPAN lang=EN-US><FONT size=3>&nbsp;<o:p></o:p></FONT></SPAN></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><FONT size=3><B><SPAN lang=EN-US>2.1<SPAN style="mso-tab-count: 1">&nbsp;&nbsp; </SPAN></SPAN></B><B><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: &#39;Times New Roman&#39;; mso-hansi-font-family: &#39;Times New Roman&#39;">创建视图</SPAN></B></FONT></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt"><FONT size=3><SPAN lang=EN-US>CREATE VIEW</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: &#39;Times New Roman&#39;; mso-hansi-font-family: &#39;Times New Roman&#39;; mso-font-kerning: 18.0pt">是</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: &#39;Times New Roman&#39;; mso-hansi-font-family: &#39;Times New Roman&#39;">创建一个虚拟表,该表以另一种方式表示一个或多个表中的数据。</SPAN><SPAN lang=EN-US>CREATE VIEW </SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: &#39;Times New Roman&#39;; mso-hansi-font-family: &#39;Times New Roman&#39;">必须是查询批处理中的第一条语句。</SPAN></FONT></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt"><SPAN style="FONT-FAMILY: 宋体"><FONT size=3>创建视图的简单语法是:<SPAN lang=EN-US><o:p></o:p></SPAN></FONT></SPAN></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt"><FONT size=3><CODE><B><SPAN lang=EN-US style="FONT-FAMILY: 宋体; mso-ansi-font-size: 10.5pt">CREATE VIEW </SPAN></B></CODE><CODE><SPAN style="FONT-FAMILY: 宋体; mso-ansi-font-size: 10.5pt">视图名<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></CODE></FONT></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt"><CODE><B><SPAN lang=EN-US style="FONT-FAMILY: 宋体; mso-ansi-font-size: 10.5pt"><FONT size=3>As<o:p></o:p></FONT></SPAN></B></CODE></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt"><FONT size=3><CODE><SPAN lang=EN-US style="FONT-FAMILY: 宋体; mso-ansi-font-size: 10.5pt"><SPAN style="mso-tab-count: 1">&nbsp; </SPAN>…</SPAN></CODE><CODE><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 黑体"><o:p></o:p></SPAN></CODE></FONT></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt"><FONT size=3><SPAN style="FONT-FAMILY: 宋体">下面的示例为<SPAN lang=EN-US>pubs库创建的名字为TestView的视图:</SPAN></SPAN><CODE><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 黑体"><o:p></o:p></SPAN></CODE></FONT></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt"><FONT size=3><B><SPAN lang=EN-US>use</SPAN></B><SPAN lang=EN-US> pubs</SPAN></FONT></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt"><B><SPAN lang=EN-US style="FONT-FAMILY: 宋体"><FONT size=3>go<o:p></o:p></FONT></SPAN></B></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt"><FONT size=3><B><SPAN lang=EN-US style="FONT-FAMILY: 宋体">Create View </SPAN></B><SPAN lang=EN-US style="FONT-FAMILY: 宋体">TestView<o:p></o:p></SPAN></FONT></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt"><B><SPAN lang=EN-US style="FONT-FAMILY: 宋体"><FONT size=3>As<o:p></o:p></FONT></SPAN></B></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt"><SPAN lang=EN-US style="FONT-FAMILY: 宋体"><FONT size=3><SPAN style="mso-tab-count: 1">&nbsp; </SPAN>Select * from authors<o:p></o:p></FONT></SPAN></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt"><SPAN style="FONT-FAMILY: 宋体"><FONT size=3>视图的使用和表基本相同,如:<SPAN lang=EN-US><o:p></o:p></SPAN></FONT></SPAN></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt 21pt; TEXT-INDENT: 21pt"><FONT size=3><B><SPAN lang=EN-US style="FONT-FAMILY: 宋体">select</SPAN></B><SPAN lang=EN-US style="FONT-FAMILY: 宋体"> * <B>from</B> pubs..testview</SPAN></FONT></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US><FONT size=3>&nbsp;<o:p></o:p></FONT></SPAN></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><FONT size=3><B><SPAN lang=EN-US>2.2<SPAN style="mso-tab-count: 1">&nbsp;&nbsp; </SPAN></SPAN></B><B><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: &#39;Times New Roman&#39;; mso-hansi-font-family: &#39;Times New Roman&#39;">删除视图</SPAN></B></FONT></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21.75pt"><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: &#39;Times New Roman&#39;; mso-hansi-font-family: &#39;Times New Roman&#39;"><FONT size=3>删除视图的语法为:</FONT></SPAN></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt 20.25pt; TEXT-INDENT: 21.75pt"><FONT size=3><B><SPAN lang=EN-US style="FONT-FAMILY: 宋体">drop</SPAN></B><SPAN lang=EN-US style="FONT-FAMILY: 宋体"> View 视图名<o:p></o:p></SPAN></FONT></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><FONT size=3><SPAN lang=EN-US><SPAN style="mso-tab-count: 1">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN></SPAN><SPAN style="FONT-FAMILY: 宋体">下面的示例为删除刚刚在<SPAN lang=EN-US>pubs库的创建的视图:</SPAN></SPAN></FONT></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><FONT size=3><B><SPAN lang=EN-US>USE</SPAN></B><SPAN lang=EN-US> pubs</SPAN></FONT></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt 21pt; TEXT-INDENT: 21pt"><FONT size=3><B><SPAN lang=EN-US>drop view </SPAN></B><SPAN lang=EN-US>testview</SPAN></FONT></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US><FONT size=3>&nbsp;<o:p></o:p></FONT></SPAN></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><FONT size=3><B><SPAN lang=EN-US>2.3<SPAN style="mso-tab-count: 1">&nbsp;&nbsp; </SPAN></SPAN></B><B><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: &#39;Times New Roman&#39;; mso-hansi-font-family: &#39;Times New Roman&#39;">创建索引</SPAN></B></FONT></P><PRE style="tab-stops: 24.75pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt"><SPAN lang=EN-US style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-hansi-font-family: &#39;Courier New&#39;; mso-bidi-font-size: 10.0pt"><SPAN style="mso-tab-count: 1">&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>为给定表或视图创建索引。只有表或视图的所有者才能为表创建索引。表或视图的所有者可以随时创建索引,无论表中是否有数据。可以通过指定限定的数据库名称,为另一个数据库中的表或视图创建索引。<o:p></o:p></SPAN></PRE><PRE style="tab-stops: 24.75pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt"><SPAN lang=EN-US style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-hansi-font-family: &#39;Courier New&#39;; mso-bidi-font-size: 10.0pt"><SPAN style="mso-tab-count: 1">&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>创建索引的简单语法是:<o:p></o:p></SPAN></PRE><PRE style="MARGIN-LEFT: 24.75pt; tab-stops: 24.75pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt"><B><SPAN lang=EN-US style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt">create</SPAN></B><SPAN lang=EN-US style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt"> [unique][clustered] <B>index</B> 索引名 <B>on</B> 表名(列[asc|desc])<o:p></o:p></SPAN></PRE><PRE style="tab-stops: 24.75pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt"><SPAN lang=EN-US><SPAN style="mso-tab-count: 1"><FONT face=黑体>&nbsp;&nbsp;&nbsp;&nbsp; </FONT></SPAN></SPAN><SPAN style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt">下面的示例为<SPAN lang=EN-US>pubs库的 <B>authors </B>表的 <B>au_id </B>列创建索引:</SPAN></SPAN></PRE><PRE><B><SPAN lang=EN-US style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt">USE</SPAN></B><SPAN lang=EN-US style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt"> pubs<o:p></o:p></SPAN></PRE><PRE><B><SPAN lang=EN-US style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt">CREATE INDEX</SPAN></B><SPAN lang=EN-US style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt"> au_id_ind<o:p></o:p></SPAN></PRE><PRE><SPAN lang=EN-US style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt"><SPAN style="mso-spacerun: yes">&nbsp;&nbsp; </SPAN><B>ON</B> authors (au_id)<o:p></o:p></SPAN></PRE><PRE><SPAN lang=EN-US><FONT face=黑体>&nbsp;<o:p></o:p></FONT></SPAN></PRE><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><FONT size=3><B><SPAN lang=EN-US>2.4<SPAN style="mso-tab-count: 1">&nbsp;&nbsp; </SPAN></SPAN></B><B><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: &#39;Times New Roman&#39;; mso-hansi-font-family: &#39;Times New Roman&#39;">删除索引</SPAN></B></FONT></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21.75pt"><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: &#39;Times New Roman&#39;; mso-hansi-font-family: &#39;Times New Roman&#39;"><FONT size=3>删除索引的语法为:</FONT></SPAN></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt 20.25pt; TEXT-INDENT: 21.75pt"><SPAN lang=EN-US style="FONT-FAMILY: 宋体"><FONT size=3>drop index 表名.索引名<o:p></o:p></FONT></SPAN></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><FONT size=3><SPAN lang=EN-US><SPAN style="mso-tab-count: 1">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN></SPAN><SPAN style="FONT-FAMILY: 宋体">下面的示例为删除刚刚在<SPAN lang=EN-US>pubs库的 <B>authors </B>表的 <B>au_id </B>列创建的索引:</SPAN></SPAN></FONT></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US><FONT size=3>USE pubs</FONT></SPAN></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US><FONT size=3>drop index authors.au_id_ind</FONT></SPAN></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US><FONT size=3>&nbsp;<o:p></o:p></FONT></SPAN></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><FONT size=3><B><SPAN lang=EN-US>2.5<SPAN style="mso-tab-count: 1">&nbsp;&nbsp; </SPAN></SPAN></B><B><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: &#39;Times New Roman&#39;; mso-hansi-font-family: &#39;Times New Roman&#39;">视图和表的区别</SPAN></B></FONT></P><SPAN lang=EN-US style="FONT-SIZE: 10.5pt; FONT-FAMILY: &#39;Times New Roman&#39;; mso-bidi-font-size: 12.0pt; mso-fareast-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA"><SPAN style="mso-tab-count: 1">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN></SPAN><SPAN style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &#39;Times New Roman&#39;; mso-hansi-font-family: &#39;Times New Roman&#39;; mso-bidi-font-size: 12.0pt; mso-font-kerning: 1.0pt; mso-bidi-font-family: &#39;Times New Roman&#39;; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">视图和表的用法基本相同。但他们之间在作用上有很大区别的:视图是用来动态的创建一个表,它占用的数据库空间比较小(基本上就是一些</SPAN><SPAN lang=EN-US style="FONT-SIZE: 10.5pt; FONT-FAMILY: &#39;Times New Roman&#39;; mso-bidi-font-size: 12.0pt; mso-fareast-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">SQL</SPAN><SPAN style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &#39;Times New Roman&#39;; mso-hansi-font-family: &#39;Times New Roman&#39;; mso-bidi-font-size: 12.0pt; mso-font-kerning: 1.0pt; mso-bidi-font-family: &#39;Times New Roman&#39;; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">语句),但使用时的执行速度一般比表要慢一些;表的缺点就是比视图占用的数据库空间大,但执行速度比较快。另外视图是以表为基础的。</SPAN>
发表于 2005-12-7 13:51:57 | 显示全部楼层
<>果然是高人啊</P>
发表于 2006-12-13 08:45:50 | 显示全部楼层
继续努力学习!!!!!
发表于 2007-1-1 13:09:14 | 显示全部楼层
继续努力学习!!!!!
发表于 2007-1-10 01:18:55 | 显示全部楼层
学习中谢谢了!!!!!
发表于 2007-2-4 08:48:49 | 显示全部楼层
发表于 2007-2-12 13:55:25 | 显示全部楼层
有必要找本书来好好研究一下!~!~~~
发表于 2007-3-7 23:53:09 | 显示全部楼层
sql2000入门容易,高手需要三年
发表于 2007-3-26 14:20:17 | 显示全部楼层
还没有入门!看起来必学啊~
发表于 2007-4-2 10:05:30 | 显示全部楼层
谢谢楼主的资料,加深了对以前学习知识理解
发表于 2007-5-30 15:48:45 | 显示全部楼层
强!一般的书应该都有介绍吧?
发表于 2007-6-18 08:33:23 | 显示全部楼层
到达高手真的要三年时间吗?
也有点太夸张了吧
发表于 2007-11-19 20:20:43 | 显示全部楼层
谢谢斑竹提供
发表于 2007-12-28 15:45:17 | 显示全部楼层
:victory:
发表于 2007-12-28 21:42:11 | 显示全部楼层

有哪位高人帮我解决一下速达3000PRO

速达3000PRO软件里面的打印样式 全没办法加进图片的。速达公司售后服务实在差,哪位高手帮我修改一下软件好吗?
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