create YTD in a Table

• subbu1

  Hall of Fame

  Points: 3281

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  September 6, 2012 at 12:30 am

  #1534241

  CREATE TABLE #Table(

  [cod] [nchar](10) NULL,

  [year] [int] NULL,

  [month] [tinyint] NULL,

  [value] [float] NULL

  ) ON [PRIMARY]

  insert into #Table values ('cod1',2011,1,100)

  insert into #Table values ('cod1',2011,2,150)

  insert into #Table values ('cod1',2011,3,200)

  insert into #Table values ('cod1',2012,1,100)

  insert into #Table values ('cod1',2012,2,180)

  --insert into #Table values ('cod1',2012,3,180)

  --insert into #Table values ('cod1',2012,4,180)

  select cod,year,month,sum(value) val

  into #temp1 from

  (select * from #Table t2

  UNION

  select t2.cod,T2.year+1,t2.month,'' ppy from #Table t2

  WHERE T2.month not in(select isnull(t5.month,0) as month from #Table t5 where (T2.year-1)=T5.year)

  )k

  group by cod,year,month

  select cod,year,month,CASE WHEN val<>0 THEN val END val,(select SUM(t1.val) from #temp1 t1 WHERE (T2.year-1)=T1.year AND T2.month>=T1.month) AS PPY from #temp1 T2

  where t2.year in(select year from #Table)

• ChrisM@Work

  SSC Guru

  Points: 186127

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  September 6, 2012 at 2:36 am

  #1534302

  ScottPletcher (9/5/2012)

  ---

  Since the table already contains the previous year's YTD totals, would a simple LEFT JOIN suffice to get the prior year's YTD total?

  SELECT

  t1curr.cod, t1curr.[year], t1curr.[month], t1curr.value, t1prev.value

  FROM dbo.Table_1 t1curr

  LEFT OUTER JOIN dbo.Table_1 t1prev ON

  t1prev.cod = t1curr.cod AND

  t1prev.[year] = t1curr.[year] - 1 AND

  t1prev.[month] = t1curr.[month]

  Assuming "cod" - whatever it is - doesn't change from year to year. If it's a stock ID then the assumption is optimistic.

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