October 3, 2006 at 1:58 pm
Guys,
I am dealing with following Duplicate sets (I have 40000 of them) for each value of BP we have different sets of seq, type. To distinguish the duplicate set I want to populate a column called subid with no of times the duplicate set occurs for each value of BP. Note that table has rows ordered by BP
BP SEQ TYPE SUBID
_____________________________
100 1 1 1
100 2 1 1
100 3 3 1
100 1 1 2
100 2 1 2
100 3 3 2
--------- SET ONE ------------
200 1 1 1
200 2 3 1
200 1 1 2
200 2 3 2
--------- SET TWO ------------
any suggestions/inputs would help
Thanks
October 3, 2006 at 2:58 pm
This code might help you:
-- Simulate data
SET NOCOUNT ON
CREATE TABLE #DUP (ID INT IDENTITY(1,1), BP INT, SEQ INT, TYPE INT)
INSERT #DUP VALUES (100 ,1 ,1 )
INSERT #DUP VALUES (100, 2, 1 )
INSERT #DUP VALUES (100, 3, 3 )
INSERT #DUP VALUES (100, 1, 1 )
INSERT #DUP VALUES (100, 2, 1 )
INSERT #DUP VALUES (100, 3, 3 )
INSERT #DUP VALUES (200, 1, 1 )
INSERT #DUP VALUES (200, 2, 3 )
INSERT #DUP VALUES (200, 1, 1 )
INSERT #DUP VALUES (200, 2, 3 )
-- Query
SELECT A.BP, A.SEQ, A.TYPE, COUNT(A.ID) AS SUBID
FROM #DUP A INNER JOIN #DUP B ON A.BP = B.BP AND A.SEQ = B.SEQ AND A.TYPE = B.TYPE AND A.ID >= B.ID
GROUP BY A.ID, A.BP, A.SEQ, A.TYPE
ORDER BY A.ID, A.BP, A.SEQ, A.TYPE
DROP TABLE #DUP
October 3, 2006 at 3:18 pm
Thanks for the reply Roi, but I need an update statement to populate the column.
Thanks
October 3, 2006 at 3:37 pm
October 5, 2006 at 4:13 am
to update the sbuid by the number of times bp, seq and type has occured in the table you may use the following statement.
update #tmp
set #tmp.sbuid = #tmp2.sbuid
from #tmp
inner join (select bp, seq, type, count(*) as sbuid
from #tmp
group by bp, seq, type) as #tmp2 on #tmp.bp = #tmp2.bp and #tmp.seq = #tmp2.seq and #tmp.type = #tmp2.type
#tmp is assumed to be your table name, #tmp2 is an alias to the select statement derived from grouping your table #tmp
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