Question

My query is as below

declare @row_id int = 2
declare @last_row_id int  =(select MAX(Row_ID) from dbo.Source)

create table #source  (
    Row_ID float null,
      [Document] [nvarchar](255) NULL,    
      [ITEMCode] [nvarchar](255) NULL,    
      [Text] [nvarchar](255) NULL)

while(@row_id<=(@last_row_id))
begin

declare @Document nvarchar(255)
declare @itemcode nvarchar(255)

select @itemcode=ITEMCode,@Document=Document from dbo.Source where Row_ID=@row_id


if ((@itemcode='' or @itemcode is null ) )
select @itemcode=ITEMCode,@Document=Document from #source where Row_ID=@row_id-1

insert into #source
select Row_ID,@Document,@itemcode,[Text]
from dbo.Source where Row_ID=@row_id

print @row_id

set @row_id= @row_id+1

end

select * from #source
drop table #source

Presently my table has 347000 rows .its taking more than a hour to get me final output . how can this query made faster . Can anyone help ?

Requirement :

Source :

  Row_ID    Document    ITEMCode     Text                   
    2      10223         20235       aaaa
    3                                    bbbb
    4                                    cccc
    5      10278         202475      xxxx
    6                                    yyyy
    7                                    yyy

Output should be :

 Row_ID  Document  ITEMCode Text    
   2       10223     20235  aaaa
   3       10223     20235  bbbb
   4       10223     20235  cccc
   5       10278    202475  xxxx
   6       10278    202475  yyyy
   7       10278    202475  yyy

Answer 1

Even though above specified queries might work , I wrote a macro in excel which we quire fast n got the output in less than 5 min