📄 asp编程常用语句小结.mht
字号:
------------------------------------------------------------<br>
<br>
</span><b><span lang=3DEN-US style=3D'font-size:10.0pt;line-height:=
150%;
color:#990000'>2. ASP与SQL数据库连=
5509;:</span></b><span
lang=3DEN-US style=3D'font-size:10.0pt;line-height:150%'><br>
<br>
------------------------------------------------------------<br>
<%@ language=3D<span class=3DSpellE>VBscript</span>%><br>
<%<br>
dim <span class=3DSpellE>conn</span><br>
set <span class=3DSpellE>conn</span>=3D<span class=3DSpellE>server.=
createobject</span>("<span
class=3DSpellE>ADODB.connection</span>")<br>
<span class=3DSpellE>con.open</span> "PROVIDER=3DSQLOLEDB;DATA
SOURCE=3DSQL服务器名称或IPß=
20;址;DATABASE=3D数据库名称;User
ID=3D<span class=3DSpellE>UserName;PWD</span>=3D数据=
4211;密码"<br>
%><br>
------------------------------------------------------------<br>
<%@ language=3D<span class=3DSpellE>VBscript</span>%><br>
<%<br>
dim <span class=3DSpellE>conn</span> <br>
Set <span class=3DSpellE>conn</span> =3D <span class=3DSpellE>Serve=
r.CreateObject</span>("<span
class=3DSpellE>ADODB.Connection</span>")<br>
<span class=3DSpellE>conn.Open</span> "driver=3D{SQL
Server};server=3DSQL服务器名称;<span
class=3DSpellE>uid</span>=3D<span class=3DSpellE>UserName;pwd</span=
>=3D数据库密码;database=3D数据=
4211;名称"<br>
%> <br>
------------------------------------------------------------ <o:p><=
/o:p></span></p>
<p style=3D'line-height:150%'><b><span style=3D'font-size:10.0pt;
line-height:150%'>建立记录集对&=
#35937;:</span></b><span
lang=3DEN-US style=3D'font-size:10.0pt;line-height:150%'><br>
<span class=3DSpellE><b>recordset.Open</b></span><b> <span class=3D=
SpellE>Source,ActiveConnection,CursorType,LockType,Options</span></b><br>
如:<br>
set <span class=3DSpellE>rs</span>=3D<span class=3DSpellE>server.cr=
eateobject</span>("<span
class=3DSpellE>adodb.recordset</span>")<br>
<span class=3DSpellE>rs.open</span> SQL语句,conn,1,3<o:=
p></o:p></span></p>
<p style=3D'line-height:150%'><b><span lang=3DEN-US style=3D'font-s=
ize:10.0pt;
line-height:150%;color:#990000'>3. SQL常用命É=
96;使用方法:</span></b><span
lang=3DEN-US style=3D'font-size:10.0pt;line-height:150%'><br>
<br>
(1) 数据记录筛选:<br>
<span class=3DSpellE>sql</span>=3D"select * from 数þ=
54;表
where 字段名=3D字段值 order by =
字段名
[<span class=3DSpellE>desc</span>]"<br>
<span class=3DSpellE>sql</span>=3D"select * from 数þ=
54;表
where 字段名 like '%字段值%' or=
der
by 字段名 [<span class=3DSpellE>desc</span>]"=
;<br>
<span class=3DSpellE>sql</span>=3D"select top 10 * from ਤ=
8;据表
where 字段名 order by 字段名 [<=
span
class=3DSpellE>desc</span>]"<br>
<span class=3DSpellE>sql</span>=3D"select * from 数þ=
54;表
where 字段名 in ('值1','值2','值=
;3')"<br>
<span class=3DSpellE>sql</span>=3D"select * from 数þ=
54;表
where 字段名 between 值1 and 值2"=
;<o:p></o:p></span></p>
<p style=3D'line-height:150%'><span lang=3DEN-US style=3D'font-size=
:10.0pt;
line-height:150%'>(2) 更新数据记ô=
05;:<br>
<span class=3DSpellE>sql</span>=3D"update 数据"=
920; set
字段名=3D字段值 where 条&=
#20214;表达式"<br>
<span class=3DSpellE>sql</span>=3D"update 数据"=
920; set
字段1=3D值1,字段2=3D值2 …=
… 字段n=3D值n
where 条件表达式"<o:p></o:p></sp=
an></p>
<p style=3D'line-height:150%'><span lang=3DEN-US style=3D'font-size=
:10.0pt;
line-height:150%'>(3) 删除数据记ô=
05;:<br>
<span class=3DSpellE>sql</span>=3D"delete from 数据=
;表
where 条件表达式"<br>
<span class=3DSpellE>sql</span>=3D"delete from 数据=
;表"
(将数据表所有记录&#=
21024;除)<o:p></o:p></span></p>
<p style=3D'line-height:150%'><span lang=3DEN-US style=3D'font-size=
:10.0pt;
line-height:150%'>(4) 添加数据记ô=
05;:<br>
<span class=3DSpellE>sql</span>=3D"insert into 数据=
;表
(字段1,字段2,字段3 …) val=
ues
(值1,值2,值3 …)"<br>
<span class=3DSpellE>sql</span>=3D"insert into 目标=
;数据表
select * from 源数据表" (<span
class=3DGramE>把源数据表</span>௚=
0;记录添加到目标数据&=
#34920;)<o:p></o:p></span></p>
<p style=3D'line-height:150%'><span lang=3DEN-US style=3D'font-size=
:10.0pt;
line-height:150%'>(5) 数据记录统ť=
45;函数:<br>
AVG(字段名) 得出一个ŝ=
20;格栏平均值<br>
COUNT(*&<span class=3DSpellE>brvbar</span>;字段=
517;) 对数据行数的统计û=
10;对某<span
class=3DGramE>一栏有值</span>的ਤ=
8;据行数统计
<br>
MAX(字段名) 取得一个ŝ=
20;格<span
class=3DGramE>栏最大</span>的值<br>
MIN(字段名) 取得一个ŝ=
20;格栏最小的值<br>
SUM(字段名) 把数据栏į=
40;值相加<br>
引用以上函数的方=
7861;:<br>
<span class=3DSpellE>sql</span>=3D"select sum(字段=
名)
as 别名 from 数据表 where 条=
0214;表达式"<br>
set <span class=3DSpellE>rs</span>=3D<span class=3DSpellE>conn.excu=
te</span>(<span
class=3DSpellE>sql</span>)<br>
用 <span class=3DSpellE>rs</span>("别名"=
;) 获取统的计值,其它=
函数运用同上。<o:p></o:p></span><=
/p>
<p style=3D'line-height:150%'><span lang=3DEN-US style=3D'font-size=
:10.0pt;
line-height:150%'>(5) 数据表的建ĺ=
35;和删除:<br>
CREATE TABLE 数据表名称(字ē=
73;1
类型1(长度),字段2 类à=
11;2(长度)
…… )<br>
例:CREATE TABLE tab01(name <span class=3DSpellE>varcha=
r</span>(50),<span
class=3DSpellE>datetime</span> default now())<o:p></o:p></span></p>
<p style=3D'line-height:150%'><span lang=3DEN-US style=3D'font-size=
:10.0pt;
line-height:150%'>DROP TABLE 数据表名ఱ=
6; (永久性删除一个数据=
;表)<br>
<br>
</span><b><span lang=3DEN-US style=3D'font-size:10.0pt;line-height:=
150%;
color:#990000'>4. 记录集对象的&=
#26041;法:
</span></b><span lang=3DEN-US style=3D'font-size:10.0pt;line-height=
:150%'><br>
<br>
<span class=3DSpellE>rs.movenext</span> 将记录=
5351;针从当前的位置向ߍ=
9;移一行<br>
<span class=3DSpellE>rs.moveprevious</span> 将记录=
;指针从当前的位置向&#=
19978;移一行<br>
<span class=3DSpellE>rs.movefirst</span> 将记录&#=
25351;针移到数据表第一Ŝ=
92;<br>
<span class=3DSpellE>rs.movelast</span> 将记录=
5351;针移到数据表最后ߌ=
8;行<br>
<span class=3DSpellE>rs.absoluteposition</span>=3DN 将记=
;录指针移到数据表第N&=
#34892;<br>
<span class=3DSpellE>rs.absolutepage</span>=3DN 将记=
4405;指针移到第N页的第Ç=
68;行<br>
<span class=3DSpellE>rs.pagesize</span>=3DN 设置每=
;页为N条记录<br>
<span class=3DSpellE>rs.pagecount</span> 根据 <span
class=3DSpellE>pagesize</span> 的设置返=
238;总页数<br>
<span class=3DSpellE>rs.recordcount</span> 返回记=
录总数<br>
<span class=3DSpellE>rs.bof</span> 返回记录=
指针是否超出数据表=
9318;端,true表示是,false为×=
42;<br>
<span class=3DSpellE>rs.eof</span> 返回记录=
指针是否超出数据表=
6411;端,true表示是,false为×=
42;<br>
<span class=3DSpellE>rs.delete</span> 删除当Ò=
69;记录,但记录指针不=
会向下移动<br>
<span class=3DSpellE>rs.addnew</span> 添加记ô=
05;到数据表末端<br>
<span class=3DSpellE>rs.update</span> 更新数þ=
54;表记录<br>
<br>
--------=
5293;--------ᦁ=
3;---------&=
#65293;--------A=
293;--<br>
<br>
<span class=3DSpellE><b>Recordset</b></span><b>对象=
041;法</b><br>
<br>
-- Open方法 --<br>
<span class=3DSpellE>recordset.Open</span> <span class=3DSpellE>Sou=
rce,ActiveConnection,CursorType,LockType,Options</span><br>
<br>
-- Source --<br>
<span class=3DSpellE>Recordset</span>对象可ߣ=
7;通过Source属性来连接Command=
545;象。Source参数可以是一&=
#20010;Command对象名称、一段SQL&#=
21629;令、一个指定的数þ=
54;表名称或是一个Stored
<br>
Procedure。假如省略这个&#=
21442;数,系统则采用<span
class=3DSpellE>Recordset</span>对象的Source़=
6;性。<o:p></o:p></span></p>
<p style=3D'line-height:150%'><span lang=3DEN-US style=3D'font-size=
:10.0pt;
line-height:150%'>-- <span class=3DSpellE>ActiveConnection</span> -=
-<br>
<span class=3DSpellE>Recordset</span>对象可ߣ=
7;通过<span
class=3DSpellE>ActiveConnection</span>属性来Ű=
30;接Connection对象。这里的<span
class=3DSpellE>ActiveConnection</span>可以是Ç=
68;个Connection对象或是一串ࡍ=
3;含数据库连接信息(<=
span
class=3DSpellE>ConnectionString</span>)的字Ļ=
26;串参数。<o:p></o:p></span></p>
<p style=3D'line-height:150%'><span lang=3DEN-US style=3D'font-size=
:10.0pt;
line-height:150%'>-- <span class=3DSpellE>CursorType</span> --<br>
<span class=3DSpellE>Recordset</span>对象Open方&#=
27861;的<span
class=3DSpellE>CursorType</span>参数表示=
3558;以什么样的游标类ࣁ=
1;启动数据,<br>
包括<span class=3DSpellE>adOpenForwardOnly</span>ӌ=
9;<span
class=3DSpellE>adOpenKeyset</span>、<span class=3DSpellE>adOp=
enDynamic</span>及<span
class=3DSpellE>adOpenStatic</span>,分述如&=
#19979;:<o:p></o:p></span></p>
<table class=3DMsoNormalTable border=3D0 cellspacing=3D1 cellpaddin=
g=3D0
width=3D600 style=3D'width:450.0pt;mso-cellspacing:.7pt;background=
:#666666;
mso-padding-alt:3.75pt 3.75pt 3.75pt 3.75pt'>
<tr style=3D'mso-yfti-irow:0'>
<td style=3D'background:black;padding:3.75pt 3.75pt 3.75pt 3.75pt=
'>
<p class=3DMsoNormal align=3Dcenter style=3D'text-align:center;li=
ne-height:
150%'><span style=3D'font-size:10.0pt;line-height:150%;color:whit=
e'>常数</span><span
lang=3DEN-US style=3D'font-size:10.0pt;line-height:150%'><o:p></o=
:p></span></p>
</td>
<td style=3D'background:black;padding:3.75pt 3.75pt 3.75pt 3.75pt=
'>
<p class=3DMsoNormal align=3Dcenter style=3D'text-align:center;li=
ne-height:
150%'><span style=3D'font-size:10.0pt;line-height:150%;color:whit=
e'>常数值</span><span
lang=3DEN-US style=3D'font-size:10.0pt;line-height:150%'><o:p></o=
:p></span></p>
</td>
<td style=3D'background:black;padding:3.75pt 3.75pt 3.75pt 3.75pt=
'>
<p class=3DMsoNormal align=3Dcenter style=3D'text-align:center;li=
ne-height:
150%'><span style=3D'font-size:10.0pt;line-height:150%;color:whit=
e'>说明</span><span
lang=3DEN-US style=3D'font-size:10.0pt;line-height:150%'><o:p></o=
:p></span></p>
</td>
</tr>
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