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发表于 2005-7-5 10:01:35 | 显示全部楼层 |阅读模式

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< class=MsoHeading8 style="MARGIN: 12pt 0cm 3.2pt"><A name=_Toc105209369></A><A name=_Toc105209464></A><A name=_Toc105209594><SPAN style="mso-bookmark: _Toc105209464"><SPAN style="mso-bookmark: _Toc105209369"><STRONG><FONT size=3><FONT face=宋体><SPAN class=MsoHyperlink><SPAN style="COLOR: black; TEXT-DECORATION: none; text-underline: none"><U>第三节<SPAN lang=EN-US><SPAN style="mso-spacerun: yes">&nbsp; </SPAN></SPAN></U></SPAN></SPAN>创建和执行存储过程、触发器和游标</FONT></FONT></STRONG></SPAN></SPAN></A></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=MsoNormal style="MARGIN: 0cm 0cm 0pt"><FONT size=3><B><SPAN lang=EN-US>3.1<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;">创建存储过程</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;">创建存储过程的关键字是</SPAN><SPAN lang=EN-US>Create Proc</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;">(也可以是</SPAN><SPAN lang=EN-US>create procedure</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;">)</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</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;">查询分析器中执行如下语句创建一个名字为</SPAN><SPAN lang=EN-US>testPro</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;">的存储过程:</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"><B><SPAN lang=EN-US><FONT size=3>go<o:p></o:p></FONT></SPAN></B></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><FONT size=3><B><SPAN lang=EN-US>create proc</SPAN></B><SPAN lang=EN-US> testProc</SPAN></FONT></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><B><SPAN lang=EN-US><FONT size=3>as <o:p></o:p></FONT></SPAN></B></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US><FONT size=3><SPAN style="mso-tab-count: 1">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>select * from authors</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;">带参数存储过程的创建:</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<B><o:p></o:p></B></SPAN></FONT></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><B><SPAN lang=EN-US><FONT size=3>go</FONT></SPAN></B></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><FONT size=3><B><SPAN lang=EN-US>create proc</SPAN></B><SPAN lang=EN-US> testProcX @name varchar(20)</SPAN></FONT></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><B><SPAN lang=EN-US><FONT size=3>as <o:p></o:p></FONT></SPAN></B></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US><FONT size=3><SPAN style="mso-tab-count: 1">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>select * from authors where au_lname = @name</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>3.2<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;">执行存储过程</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;">执行无参数存储过程的语句是:</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>exec</B> pubs..testproc</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;">执行带参数存储过程的语句是(注意参数的赋值):</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>exec</B> pubs..testprocx @name=&#39;white&#39;</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>3.3<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;">删除存储过程</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;">删除无参数和带参数的存储过程的语句分别是:</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> pubs</FONT></SPAN></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt 21pt; TEXT-INDENT: 21pt"><FONT size=3><B><SPAN lang=EN-US>drop proc </SPAN></B><SPAN lang=EN-US>testProc</SPAN></FONT></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt 21pt; 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"><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>drop proc </B>testprocX</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>3.4<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;">创建触发器</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>CREATE TRIGGER</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;">创建触发器,触发器是一种特殊的存储过程,在用户试图对指定的表执行指定的数据修改语句时自动执行。</SPAN><SPAN lang=EN-US>Microsoft&reg; SQL Server&#8482; </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;">允许为任何给定的</SPAN><SPAN lang=EN-US> INSERT</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;">、</SPAN><SPAN lang=EN-US>UPDATE </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;">或</SPAN><SPAN lang=EN-US> DELETE </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;">语句创建多个触发器。</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</SPAN><SPAN lang=EN-US>pubs</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;">库中的</SPAN><SPAN lang=EN-US>titles</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;">表上创建一个名字为</SPAN><CODE><SPAN lang=EN-US style="FONT-FAMILY: 宋体; mso-ansi-font-size: 10.5pt">mySelect</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;">触发器,当对改表做插入和更新操作时,该触发器自动执行,检索出修改后的</SPAN><SPAN lang=EN-US>titles</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;">表的记录:</SPAN></FONT></P><PRE><CODE><B><SPAN lang=EN-US style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt">use</SPAN></B></CODE><CODE><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></CODE></PRE><PRE><CODE><SPAN lang=EN-US style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt">go<o:p></o:p></SPAN></CODE></PRE><PRE><CODE><B><SPAN lang=EN-US style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt">CREATE TRIGGER</SPAN></B></CODE><CODE><SPAN lang=EN-US style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt"> mySelect<o:p></o:p></SPAN></CODE></PRE><PRE><CODE><B><SPAN lang=EN-US style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt">ON</SPAN></B></CODE><CODE><SPAN lang=EN-US style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt"> titles<o:p></o:p></SPAN></CODE></PRE><PRE><CODE><B><SPAN lang=EN-US style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt">FOR</SPAN></B></CODE><CODE><SPAN lang=EN-US style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt"> INSERT, UPDATE <o:p></o:p></SPAN></CODE></PRE><PRE><CODE><B><SPAN lang=EN-US style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt">as<o:p></o:p></SPAN></B></CODE></PRE><PRE><CODE><SPAN lang=EN-US style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt"><SPAN style="mso-tab-count: 1">&nbsp;&nbsp; </SPAN>Select * from titles<o:p></o:p></SPAN></CODE></PRE><PRE><CODE><B><SPAN lang=EN-US style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt">GO</SPAN><SPAN lang=EN-US><o:p></o:p></SPAN></B></CODE></PRE><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;">可执行如下语句看一下触发器的运行结果:</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>update</B> titles <B>set</B> price = 19 <B>where</B><SPAN style="mso-spacerun: yes">&nbsp; </SPAN>title_id = &#39;bu1032&#39;</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>3.5<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;">删除触发器</SPAN></B></FONT></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><FONT size=3><SPAN lang=EN-US style="FONT-FAMILY: 宋体"><SPAN style="mso-tab-count: 1">&nbsp;&nbsp;&nbsp; </SPAN>DROP TRIGGER</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-font-kerning: 18.0pt">是</SPAN><SPAN style="FONT-FAMILY: 宋体">从当前数据库中删除一个或多个触发器。其语法为:<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></FONT></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><FONT size=3><SPAN lang=EN-US style="FONT-FAMILY: 宋体"><SPAN style="mso-tab-count: 1">&nbsp;&nbsp;&nbsp; </SPAN></SPAN><SPAN lang=EN-US>DROP TRIGGER { </SPAN><I><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: &#39;Times New Roman&#39;; mso-hansi-font-family: &#39;Times New Roman&#39;">触发器名字</SPAN> </I><SPAN lang=EN-US>} [ <B>,</B>...<I>n </I>]</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;">删除触发器的语句是:</SPAN></FONT></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US><FONT size=3><SPAN style="mso-tab-count: 1">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN><B>use</B> pubs</FONT></SPAN></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US><FONT size=3><SPAN style="mso-tab-count: 1">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN><B>DROP TRIGGER</B> mySelect</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>3.6<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;">游标的使用</SPAN></B></FONT></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt"><SPAN lang=EN-US style="FONT-FAMILY: 宋体"><FONT size=3>DECLARE CURSOR定义 Transact-SQL 服务器游标的特性,例如游标的滚动行为和用于生成游标对其进行操作的结果集的查询。<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>创建游标的简单语法是:<SPAN lang=EN-US><o:p></o:p></SPAN></FONT></SPAN></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt 42pt"><B><SPAN lang=EN-US><FONT size=3>DECLARE</FONT></SPAN></B><FONT size=3><SPAN lang=EN-US> <I>cursor_name</I> <B>CURSOR</B> <BR><B>FOR</B> <I>select_statement </I></SPAN><SPAN lang=EN-US style="FONT-FAMILY: 宋体"><o:p></o:p></SPAN></FONT></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt"><SPAN style="FONT-FAMILY: 宋体"><FONT size=3>下面是一个具体创建使用游标的语句:<SPAN lang=EN-US><o:p></o:p></SPAN></FONT></SPAN></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US style="FONT-FAMILY: 宋体"><FONT size=3>--建立(定义)一个游标<o:p></o:p></FONT></SPAN></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><FONT size=3><B><SPAN lang=EN-US>DECLARE</SPAN></B><SPAN lang=EN-US> authors_cursor CURSOR </SPAN></FONT></P><H6><SPAN lang=EN-US style="FONT-FAMILY: &#39;Times New Roman&#39;"><FONT size=3>FOR <o:p></o:p></FONT></SPAN></H6><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US style="FONT-FAMILY: 宋体"><FONT size=3><SPAN style="mso-tab-count: 1">&nbsp; </SPAN>SELECT au_lname<o:p></o:p></FONT></SPAN></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US style="FONT-FAMILY: 宋体"><FONT size=3><SPAN style="mso-tab-count: 1">&nbsp; </SPAN>FROM authors<o:p></o:p></FONT></SPAN></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US style="FONT-FAMILY: 宋体"><FONT size=3>&nbsp;<o:p></o:p></FONT></SPAN></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US style="FONT-FAMILY: 宋体"><FONT size=3>--(打开游标)<o:p></o:p></FONT></SPAN></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><FONT size=3><B><SPAN lang=EN-US style="FONT-FAMILY: 宋体">OPEN</SPAN></B><SPAN lang=EN-US style="FONT-FAMILY: 宋体"> authors_cursor<o:p></o:p></SPAN></FONT></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US style="FONT-FAMILY: 宋体"><FONT size=3>&nbsp;<o:p></o:p></FONT></SPAN></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US style="FONT-FAMILY: 宋体"><FONT size=3>--取游标记录,插入到变量中<o:p></o:p></FONT></SPAN></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><FONT size=3><B><SPAN lang=EN-US style="FONT-FAMILY: 宋体">FETCH NEXT FROM</SPAN></B><SPAN lang=EN-US style="FONT-FAMILY: 宋体"> authors_cursor<SPAN style="mso-spacerun: yes">&nbsp; </SPAN><B>INTO</B> @au_lname<o:p></o:p></SPAN></FONT></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US style="FONT-FAMILY: 宋体"><FONT size=3>&nbsp;<o:p></o:p></FONT></SPAN></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US style="FONT-FAMILY: 宋体"><FONT size=3>--浏览游标记录<o:p></o:p></FONT></SPAN></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US style="FONT-FAMILY: 宋体"><FONT size=3>WHILE @@FETCH_STATUS = 0 <o:p></o:p></FONT></SPAN></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US style="FONT-FAMILY: 宋体"><FONT size=3>BEGIN <o:p></o:p></FONT></SPAN></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US style="FONT-FAMILY: 宋体"><FONT size=3><SPAN style="mso-tab-count: 1">&nbsp; </SPAN>print @au_lname<o:p></o:p></FONT></SPAN></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US style="FONT-FAMILY: 宋体"><FONT size=3><SPAN style="mso-tab-count: 1">&nbsp; </SPAN>--取下一记录<o:p></o:p></FONT></SPAN></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US style="FONT-FAMILY: 宋体"><FONT size=3><SPAN style="mso-tab-count: 1">&nbsp; </SPAN><B>FETCH NEXT</B> FROM authors_cursor<SPAN style="mso-spacerun: yes">&nbsp; </SPAN>INTO @au_lname<o:p></o:p></FONT></SPAN></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US style="FONT-FAMILY: 宋体"><FONT size=3>END<o:p></o:p></FONT></SPAN></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US style="FONT-FAMILY: 宋体"><FONT size=3>&nbsp;<o:p></o:p></FONT></SPAN></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US style="FONT-FAMILY: 宋体"><FONT size=3>--关闭游标<o:p></o:p></FONT></SPAN></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><FONT size=3><B><SPAN lang=EN-US style="FONT-FAMILY: 宋体">CLOSE</SPAN></B><SPAN lang=EN-US style="FONT-FAMILY: 宋体"> authors_cursor<o:p></o:p></SPAN></FONT></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US style="FONT-FAMILY: 宋体"><FONT size=3>&nbsp;<o:p></o:p></FONT></SPAN></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US style="FONT-FAMILY: 宋体"><FONT size=3>--(释放游标)<o:p></o:p></FONT></SPAN></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><FONT size=3><B><SPAN lang=EN-US style="FONT-FAMILY: 宋体">DEALLOCATE</SPAN></B><SPAN lang=EN-US style="FONT-FAMILY: 宋体"><SPAN style="mso-spacerun: yes">&nbsp; </SPAN>authors_cursor<o:p></o:p></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>
发表于 2005-12-7 13:52:37 | 显示全部楼层
呵呵,终于可以学点东西了
发表于 2006-5-10 12:19:54 | 显示全部楼层
<FONT color=#ff0033 size=4>楼主是不是个电脑虚拟人啊!</FONT>
发表于 2006-11-11 10:49:04 | 显示全部楼层
搂主辛苦了
内容挺好的 要是能结合用友来讲解就更好了
发表于 2006-12-13 08:48:03 | 显示全部楼层
同意楼上意见!!!!!!
发表于 2007-11-25 15:29:56 | 显示全部楼层
谢谢楼主提供。我要学习一下
发表于 2008-4-19 11:28:18 | 显示全部楼层
谢谢楼主提供。我要学习一下
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