Using Group By to get Desired Result - sql

Question

I have a table "Table1" like below:
EffectiveDate Client Fund RunDate UserId
2014-05-31 A AGG 2014-06-03 user
2014-03-31 A AGG 2014-07-01 user
2014-10-31 A AGG 2014-11-04 user
2014-09-30 A EFA 2013-10-10 user
2014-11-31 A EFA 2014-01-15 user
2014-01-31 A EFA 2014-02-03 user
I need to get result like if Effective Date is maximum for any given input date then it'll only return that record for a particular Fund.I am using query to get desired result like :
SELECT Max(tbl.effectivedate) AS EffectiveDate,
tbl.client,
tbl.fund,
tbl.rundate,
tbl.userid
FROM (SELECT effectivedate,
client,
fund,
rundate,
userid
FROM Table1
WHERE effectivedate < = '11/01/2014') AS tbl
GROUP BY tbl.client,
tbl.fund,
tbl.rundate,
tbl.userid
But I am not getting the desired result. Please if anyone help me.
Desired Output :
EffectiveDate Client Fund RunDate UserId
2014-10-31 A AGG 2014-11-04 user
2014-09-30 A EFA 2013-10-10 user

Answer 1

Try this one:
SAMPLE DATA
create table #table1(
EffectiveDate date,
Client varchar(100),
Fund varchar(100),
RunDate date,
UserId varchar(100)
)
insert into #table1
select '2014-05-31', 'A', 'AGG', '2014-06-03', 'user' union all
select '2014-03-31', 'A', 'AGG', '2014-07-01', 'user' union all
select '2014-10-31', 'A', 'AGG', '2014-11-04', 'user' union all
select '2014-09-30', 'A', 'EFA', '2013-10-10', 'user' union all
select '2014-11-30', 'A', 'EFA', '2014-01-15', 'user' union all
select '2014-01-31', 'A', 'EFA', '2014-02-03', 'user'
CTE SOLUTION
;with cte as(
select
*,
rn = row_number() over(partition by Fund order by EffectiveDate desc)
from #table1
where
EffectiveDate <= '2014/11/01'
)
select
EffectiveDate,
Client,
Fund,
RunDate,
UserId
from cte
where
rn = 1
WITHOUT CTE AND ROW_NUMBER()
select
t1.*
from #table1 t1
inner join (
select
EffectiveDate = MAX(EffectiveDate),
Fund
from #table1
where
EffectiveDate <= '2014/11/01'
group by Fund
) t2
on t2.fund = t1.fund
and t2.EffectiveDate = t1.EffectiveDate

Answer 2

Another way to do it if you are interested. You were almost there with your original code (fiddle here: http://sqlfiddle.com/#!3/20926c/9):
SELECT effectivedate,
client,
fund,
rundate,
userid
FROM
(
SELECT MAX(tbl.effectivedate) OVER (PARTITION BY tbl.client, tbl.fund) AS MaxEffDateByClientByFund,
tbl.effectivedate,
tbl.client,
tbl.fund,
tbl.rundate,
tbl.userid
FROM Table1 tbl
WHERE effectivedate < = '20141101'
) tbl2
WHERE effectivedate = MaxEffDateByClientByFund;