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                         ifexists(selectfromdbo.sysobjectswhereid=object_id(N'[dbo].[f_Sql]')andxtypein(N'FN',N'IF',N'TF'))  dropfunction[dbo].[f_Sql]  GO ifexists(selectfromdbo.sysobjectswhereid=object_id(N'[序数表]')andOBJECTPROPERTY(id,N'IsUserTable')=1)  droptable[序数表]  GO --为了效率,所以要一个辅助表配合  selecttop1000id=identity(int,1,1)into序数表  fromsyscolumnsa,syscolumnsb  altertable序数表addconstraintpk_id_序数表primarykey(id)  go /--根据指定字符串生成查询的模糊匹配字符串 条件连接的关键字为and,or  可以任意指定括号  生成的条件表达式为like模糊匹配 --邹建2004.08(引用请保留此信息)--/ /--调用示例 --调用示例  selectA=dbo.f_Sql('(WeborHTMLorInternet)and(ProgrammerorDeveloper)','content')  selectB=dbo.f_Sql('WeborHTMLorInternet','content')  selectC=dbo.f_Sql('(WebandHTML)','content')  selectD=dbo.f_Sql('Web','content')  --/  --示例函数  createfunctionf_Sql(  @strNvarchar(1000),--要检索的字符串  @fdnamesysname--在那个字段中检索  )returnsNvarchar(4000)  as  begin  declare@rNvarchar(4000)  set@r=''  select@r=@r+case  whensubstring(@str,id,charindex('',@str+'',id)-id)in('or','and')  then''+substring(@str,id)-id)+''  whensubstring(@str,1)='('  then'(['+@fdname+']like''%'  +substring(@str,id+1,id)-id-1)  +'%'''  whensubstring(@str,id)-1,1)=')'  then'['+@fdname+']like''%'  +substring(@str,id)-id-1)  +'%'')'  else'['+@fdname+']like''%'  +substring(@str,id)-id)  +'%'''  end  from序数表  whereid<=len(@str)  andcharindex('',''+@str,id)-id=0  return(@r)  end  go                          (编辑:莱芜站长网) 
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