I have a 500,000 row table that needs to be processed row wise. I put the code below but there is no set wise way to do it. It is taking 30 minutes to process. I would so appreciate ANY suggestions on how I might speed things up.
DECLARE tx_cursor CURSOR local for select DISTINCT customer, etc from customer a left join Expenses b on ltrim(rtrim(a.description))= b.DESCRIPTION left join Groups c on c.GROUPNAME = a.TXGROUP WHERE ( conditions ) declare @fid1, @fid2, etc; declare @customerlevel char(1) = 'T'; open tx_cursor; FETCH NEXT FROM tx_cursor INTO @fid1, @fid2, etc;; declare @lastcust char(16) = @customer; declare @resetgroup char(1) = 'T' WHILE @@FETCH_STATUS = 0 begin if @description = 'NET INCOME' begin set @customerlevel = 'F'; set @currentgroup = ''; set @txgroup = ''; set @resetgroup = 'T'; end else begin if @lastcustomer != @customer begin set @customerlevel = 'T'; set @currentgroup = ''; SET @resetgroup = 'F'; end if @resetgroup = 'T' BEGIN if @customerlevel = 'F' select @lookupgroup = groupname from #groups where groupname = ltrim(@txgroup); if @lookupgroup is not null set @currentgroup = @lookupgroup; END if @customerlevel = 'T' and @txlevel = 'M' begin if @incmonth+@incunits>0 insert into file2 (fids) values (@fids) if @exptot+@expunits>0 insert into file2 (fids) values (@fids2) end if @customerlevel = 'F' and @txlevel = 'C' begin if @incmonth+@incunits>0 insert into file2 (fids) values (@fids) if @exptot+@expunits>0 insert into file2 (fids) values (@fids2) end end set @lastcustomer = @customer; FETCH NEXT FROM tx_cursor INTO @fids; end CLOSE tx_cursor; DEALLOCATE tx_cursor;
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