problem retrieving correct max(date) row from this dataset

Hello,
I respectfully request if someone could help me modify the following query:
The goal is to retrieve a record with a curExpireDate of 12/31/05 where ther
e
is more than one row for a given curRecordID - note: in the following
dataset there is only one correct row that I want to retrieve. So for given
curRecordID there is more than one row for a curExpireDate >= 12/31/05. The
n
if curEntryDate for a curExpireDate of 12/31/05 is greater than the
curEntryDate for curExpireDate of 12/31/06 (for the same curRecordID) then I
want to retrieve that row.
The following subdataset (the actual dataset contains thousands of rows
where I need to do the same thing) contains one row where Max(curExpireDate)
= 12/31/05. I don't want that row. There are 3 more curRecordID's with
curExpireDate of 12/31/05 and 12/31/06. For the rows with curRecordID =
18537 this ID contains a row for curExpireDate = 12/31/05 where
Max(curEntryDate) is greater than the curEntryDate for curExpireDate of
12/31/06 for ID = 18537. None of the otherID's has this condition. I need
to retrieve ID 18537 where curEntryDate = 1/27/06 and curExpireDate =
12/31/05.
Here is the dataset and the query I have been experimenting with:
create table #temp4(curRecordID int,
curEntryDate datetime, curExpireDate datetime)
insert Into #temp4
select 12783, '2005-04-07', '2005-12-31' Union
select 12783, '2004-01-12', '2005-12-31' Union
select 12783, '2006-02-03', '2006-12-31' Union
select 12783, '2005-01-11', '2006-12-31' Union
select 29714, '2005-06-29', '2005-12-31' Union
select 29714, '2005-02-02', '2006-12-31' Union
select 29714, '2005-12-01', '2006-12-31' Union
select 18537, '2004-12-10', '2005-12-31' Union
select 18537, '2006-01-27', '2005-12-31' Union --<--yes want this row
select 18537, '2006-01-10', '2006-12-31' Union
select 38537, '2004-12-10', '2005-12-31' --<--don't want this row
SELECT * FROM #temp4 as X
WHERE
curRecordID NOT IN --the list of recid from beginning
(SELECT curRecordID FROM #temp4 GROUP BY curRecordID
HAVING MAX(curExpireDate)='12/31/05')
AND
curExpireDate = '12/31/05' --order by curRecordID
AND curEntryDate >
(select top 1 curEntryDate from #temp4 as Y
where X.curRecordID = Y.curRecordID
and Y.curExpireDate =
(select max(curExpireDate) from #temp4 as Z
where X.curRecordID = Z.curRecordID))
This is the current resultset - which is not the desired resultset
curRecID curEntryDate curExpireDate
12783 2005-04-07 00:00:00.000 2005-12-31 00:00:00.000 --X
18537 2006-01-27 00:00:00.000 2005-12-31 00:00:00.000 -- +
29714 2005-06-29 00:00:00.000 2005-12-31 00:00:00.000 --X
There is no way for me to isolate my desired row from this resultset
The desired resultset is this:
curRecID curEntryDate curExpireDate
18537 2006-01-27 00:00:00.000 2005-12-31 00:00:00.000
Any help appreciated,
Thanks,
RichI think I found my problem. I changed
(select top 1 curEntryDate from #temp4 as Y...
to
(select Max(curEntryDate) from #temp4 as Y
This is now giving me the desired result in my test case. Hopefully, will
do the same for the actual data.
"Rich" wrote:

> Hello,
> I respectfully request if someone could help me modify the following query
:
> The goal is to retrieve a record with a curExpireDate of 12/31/05 where th
ere
> is more than one row for a given curRecordID - note: in the following
> dataset there is only one correct row that I want to retrieve. So for giv
en
> curRecordID there is more than one row for a curExpireDate >= 12/31/05. T
hen
> if curEntryDate for a curExpireDate of 12/31/05 is greater than the
> curEntryDate for curExpireDate of 12/31/06 (for the same curRecordID) then
I
> want to retrieve that row.
> The following subdataset (the actual dataset contains thousands of rows
> where I need to do the same thing) contains one row where Max(curExpireDat
e)
> = 12/31/05. I don't want that row. There are 3 more curRecordID's with
> curExpireDate of 12/31/05 and 12/31/06. For the rows with curRecordID =
> 18537 this ID contains a row for curExpireDate = 12/31/05 where
> Max(curEntryDate) is greater than the curEntryDate for curExpireDate of
> 12/31/06 for ID = 18537. None of the otherID's has this condition. I nee
d
> to retrieve ID 18537 where curEntryDate = 1/27/06 and curExpireDate =
> 12/31/05.
> Here is the dataset and the query I have been experimenting with:
> create table #temp4(curRecordID int,
> curEntryDate datetime, curExpireDate datetime)
> insert Into #temp4
> select 12783, '2005-04-07', '2005-12-31' Union
> select 12783, '2004-01-12', '2005-12-31' Union
> select 12783, '2006-02-03', '2006-12-31' Union
> select 12783, '2005-01-11', '2006-12-31' Union
> select 29714, '2005-06-29', '2005-12-31' Union
> select 29714, '2005-02-02', '2006-12-31' Union
> select 29714, '2005-12-01', '2006-12-31' Union
> select 18537, '2004-12-10', '2005-12-31' Union
> select 18537, '2006-01-27', '2005-12-31' Union --<--yes want this row
> select 18537, '2006-01-10', '2006-12-31' Union
> select 38537, '2004-12-10', '2005-12-31' --<--don't want this row
> SELECT * FROM #temp4 as X
> WHERE
> curRecordID NOT IN --the list of recid from beginning
> (SELECT curRecordID FROM #temp4 GROUP BY curRecordID
> HAVING MAX(curExpireDate)='12/31/05')
> AND
> curExpireDate = '12/31/05' --order by curRecordID
> AND curEntryDate >
> (select top 1 curEntryDate from #temp4 as Y
> where X.curRecordID = Y.curRecordID
> and Y.curExpireDate =
> (select max(curExpireDate) from #temp4 as Z
> where X.curRecordID = Z.curRecordID))
>
> This is the current resultset - which is not the desired resultset
> curRecID curEntryDate curExpireDa
te
> 12783 2005-04-07 00:00:00.000 2005-12-31 00:00:00.000 --X
> 18537 2006-01-27 00:00:00.000 2005-12-31 00:00:00.000 -- +
> 29714 2005-06-29 00:00:00.000 2005-12-31 00:00:00.000 --X
> There is no way for me to isolate my desired row from this resultset
> The desired resultset is this:
> curRecID curEntryDate curExpireDa
te
> 18537 2006-01-27 00:00:00.000 2005-12-31 00:00:00.000
> Any help appreciated,
> Thanks,
> Rich

Problem of max(count(*))

Can someone tell me why the following sql statement cannot retrieve the
maximum count of the record:

SELECT col, max(count(*)) FROM table
GROUP BY col

And also, can I use one sql statement to retrieve the maximum count of the
record? If not, how?

Thank you more!!Hello,

you use two group function MAX and COUNT in one statement, but there is only on group by function. So the error will be "no group ..."

The count is already the maximum in the group col, but if you need the
maximum of all col the use

SELECT max(count(*)) FROM table

Hope that helps

Manfred Peter
Alligator Company Software GmbH
http://www.alligatorsql.com|||i dont know what you exactly want to retrive using max(count(*))

actually count(*) will return only one value which is maximum.

so i think the following should work for u

SELECT col, count(*) FROM table
GROUP BY col|||hi,

the only way max(count()) will have any meaning, is by getting more then 1 row from count()....
Only that case the max function will have any relevance.

example:
select count(*) from emp return one row. This is always the max
select count(*), deptno from emp group by deptno will return 3 rows. Now I have a situation in which a max would have relevance.

Hope this helps|||SELECT max(count(*)) FROM table
GROUP BY col
/*that's all folks!*/