SQL Server编写存储过程小工具(三)

sql server编写存储过程小工具
功能：为给定表创建update存储过程
语法： sp_genupdate <table name>,<primary key>,<stored procedure name>
以northwind 数据库为例
sp_genupdate 'employees','employeeid','upd_employees'

注释：如果您在master系统数据库中创建该过程，那您就可以在您服务器上所有的数据库中使用该过程。

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create procedure sp_genupdate
@tablename varchar(130),
@primarykey varchar(130),
@procedurename varchar(130)
as
set nocount on

declare @maxcol int,
@tableid int
'knowsky.com
set @tableid = object_id(@tablename)

select @maxcol = max(colorder)
from syscolumns
where id = @tableid

select 'create procedure ' + rtrim(@procedurename) as type,0 as colorder into #tempproc
union
select convert(char(35),'@' + syscolumns.name)
+ rtrim(systypes.name)
+ case when rtrim(systypes.name) in ('binary','char','nchar','nvarchar','varbinary','varchar') then '(' + rtrim(convert(char(4),syscolumns.length)) + ')'
when rtrim(systypes.name) not in ('binary','char','nchar','nvarchar','varbinary','varchar') then ' '
end
+ case when colorder < @maxcol then ','
when colorder = @maxcol then ' '
end
as type,
colorder
from syscolumns
join systypes on syscolumns.xtype = systypes.xtype
where id = @tableid and systypes.name <> 'sysname'
union
select 'as',@maxcol + 1 as colorder
union
select 'update ' + @tablename,@maxcol + 2 as colorder
union
select 'set',@maxcol + 3 as colorder
union
select syscolumns.name + ' = @' + syscolumns.name
+ case when colorder < @maxcol then ','
when colorder = @maxcol then ' '
end
as type,
colorder + @maxcol + 3 as colorder
from syscolumns
join systypes on syscolumns.xtype = systypes.xtype
where id = @tableid and syscolumns.name <> @primarykey and systypes.name <> 'sysname'
union
select 'where ' + @primarykey + ' = @' + @primarykey,(2 * @maxcol) + 4 as colorder
order by colorder

select type from #tempproc order by colorder

drop table #tempproc
/*＝＝＝＝＝＝＝源程序结束＝＝＝＝＝＝＝＝＝*/