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加速你数据库和程序开发的存储过程

类别: ASP教程  评论数:0 总得分:0
如果你是一个数据库工作者,或者是一个代码编写者,你是否为填写那些字段烦恼呢?少还好说,如果达到几十个,你一定会被弄得昏头晕脑,一下就失去了编写代码的快乐。

第一步,建立视图!
create VIEW Col AS
select
b.Name ColName,
b.ColID,
c.Name xColtype,
(select Name from systypes where xUserType = c.xType and xType = xUserType) ColType,/*convert user define type to system type*/
b.Length Sizes,
b.Prec Prec,
b.xScale Scale,
convert(bit,b.status&8) Nulls,
a.Name ObjectName,
a.Type ObjectType
from sysobjects A,syscolumns b,systypes c
where a.type in (\'U\',\'V\',\'P\') and a.Id=b.Id and b.Xusertype=c.Xusertype

第一步,建立存储过程!
CREATE PROCEDURE sysgetcol
@objectname Char(80)
AS
declare
@objecttype char(10)
select
@objecttype = objecttype
from COL
where objectname = @objectname

if @@ROWCOUNT = 0
begin
Print \'Internal Error(001):\'
Print \' not found object :\'\'\' + Rtrim(@objectname) +\'\'\'!\'
Return -1
end


select
colname,
colType types,
xColType,
sizes,
prec,
scale,
colid,
Nulls
Into #temp
from COL
where objectname = @objectname
order by colid
--PATINDEX(\'%pattern%\', expression)

--Script object Structure
if @objecttype = \'U\'
begin
select \'Create Table \' + Rtrim(@objectname) + \' (\'
union all
select \' \' + Rtrim(colname) + \' \' + RTrim(xColType)+
Case xColType when \'Char\' then \'(\'+RTrim(Convert(Char(3),sizes))+\')\'
when \'Numeric\' then \'(\' + RTrim(Convert(Char(3),Prec)) + \',\' + RTrim(Convert(Char(3),Scale)) + \')\'
when \'Varchar\' then \'(\'+RTrim(Convert(Char(3),sizes))+\') \'
when \'nchar\' then \'(\' + RTrim(Convert(Char(3) ,sizes)) + \')\'
when \'nvarchar\' then \'(\' + RTrim(Convert(Char(3) ,sizes)) + \')\'
else \'\'
end +
case nulls when 0 then\' Not Null\' else \'\' end + \' ,\'
from #temp
union all
select \')\'
end

/*Building select statement*/

select \'CREATE VIEW view_\' + RTrim(@objectname) + \' AS\' + Char(10) + \'select \'
union all
select \' \'+RTrim(colname)+\',\' from #temp --order by colid
union all
select \'from \'+ RTrim(@objectname)

/******update #temp set sizes=Null where Types<>\'Char\'******/
--bulid procedure parameter
select \'CREATE PROCEDURE \' + RTrim(@objectname) + \'_Update\'
UNION ALL
select
\' @\' + RTrim(colname) + \' \' + RTrim(xColType)+
Case xColType when \'Char\' then \'(\'+RTrim(Convert(Char(3),sizes))+\') ,\'
when \'Numeric\' then \'(\' + RTrim(Convert(Char(3),Prec)) + \',\' + RTrim(Convert(Char(3),Scale)) + \') ,\'
when \'Varchar\' then \'(\'+RTrim(Convert(Char(3),sizes))+\') ,\'
when \'nchar\' then \'(\' + RTrim(Convert(Char(3) ,sizes)) + \')\'
when \'nvarchar\' then \'(\' + RTrim(Convert(Char(3) ,sizes)) + \')\'
else \' ,\'
end
from #temp
--order by colid
UNION ALL
select \'AS\'
/*Building update part*/
UNION ALL
select \' update \' + RTrim(@objectname) + \' set\'
UNION ALL
select \' \'+RTrim(colname)+\' = @\'+RTrim(colname)+\' ,\' from #temp-- order by colid
Union All
select \' where \'
Union All
select \' \'+RTrim(colname)+\' = @\'+RTrim(colname)+\' and\' from #temp-- order by colid
UNION ALL
/*update #temp set sizes=Null*/

/*Building Insert statement*/
select \' if @@ROWCOUNT = 0\'
UNION ALL
select \' insert into \' + Rtrim(@objectname) + \'(\'
UNION ALL
select \' \'+RTrim(colname)+\' ,\' from #temp-- order by colid
UNION ALL
select \' )\'
UNION ALL
select \' values(\'
UNION ALL
select \' @\'+RTrim(colname)+\' ,\' from #temp --order by colid
UNION ALL
select \' )\'

select \' \'+RTrim(colname)+\' = Trim(request("\'+RTrim(colname)+\'"))\' from #temp

select \' \'+RTrim(colname)+\' = Trim(rs("\'+RTrim(colname)+\'"))\' from #temp --order by colid

select \' .parameters(\'+Rtrim(colid)+\') = \'+ colname from #temp --order by colid
GO


第三步,使用该存储过程!
假设你的数据库里有一个叫做Nta_base_member的表
Create Table Nta_base_member (
m_id bigint Not Null ,
m_type smallint ,
m_state smallint ,
memberid bigint ,
travelco_id bigint
)

打开你的查询分析器,键入
sysgetcol Nta_base_member

然后按ctrl+t,然后按F5,看看查询分析器出现什么东东?

所影响的行数为 5 行)


---------------------------------------------------------------------------
Create Table Nta_base_member (
m_id bigint Not Null ,
m_type smallint ,
m_state smallint ,
memberid bigint ,
travelco_id bigint ,
)

(所影响的行数为 7 行)


-----------------------------------------------------------------------------
CREATE VIEW view_Nta_base_member AS
select
m_id,
m_type,
m_state,
memberid,
travelco_id,
from Nta_base_member

(所影响的行数为 7 行)


------------------------------------------------------------------------------
CREATE PROCEDURE Nta_base_member_Update
@m_id bigint ,
@m_type smallint ,
@m_state smallint ,
@memberid bigint ,
@travelco_id bigint ,
AS
update Nta_base_member set
m_id = @m_id ,
m_type = @m_type ,
m_state = @m_state ,
memberid = @memberid ,
travelco_id = @travelco_id ,
where
m_id = @m_id and
m_type = @m_type and
m_state = @m_state and
memberid = @memberid and
travelco_id = @travelco_id and
if @@ROWCOUNT = 0
insert into Nta_base_member(
m_id ,
m_type ,
m_state ,
memberid ,
travelco_id ,
)
values(
@m_id ,
@m_type ,
@m_state ,
@memberid ,
@travelco_id ,
)

(所影响的行数为 34 行)


------------------------------------------------------------------------------
m_id = Trim(request("m_id"))
m_type = Trim(request("m_type"))
m_state = Trim(request("m_state"))
memberid = Trim(request("memberid"))
travelco_id = Trim(request("travelco_id"))

(所影响的行数为 5 行)


-----------------------------------------------------------------------------
m_id = Trim(rs("m_id"))
m_type = Trim(rs("m_type"))
m_state = Trim(rs("m_state"))
memberid = Trim(rs("memberid"))
travelco_id = Trim(rs("travelco_id"))

(所影响的行数为 5 行)

-----------------------------------------------------------------------------
.parameters(1) = m_id
.parameters(2) = m_type
.parameters(3) = m_state
.parameters(4) = memberid
.parameters(5) = travelco_id

(所影响的行数为 5 行)

看到生成的代码,你应该明白什么了吧?呵呵,ctrl+c到你要写的代码里了
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