Count distinct within a query

Hi there,
I have a below query that has a count field, which I want to have count of unique records.
SELECT [SGMT_REV_BY_SITE].GLSeq, Count([SGMT_REV_BY_SITE].SITE_ADDR_ID) AS NUM_SITES, [SGMT_REV_BY_SITE].SGMNT1, [SGMT_REV_BY_SITE].SGMNT2, [SGMT_REV_BY_SITE].LOB$, [SGMT_REV_BY_SITE].PERIOD, [SGMT_REV_BY_SITE].RECUR, [SGMT_REV_BY_SITE].PROMOTED, Sum([SGMT_REV_BY_SITE].REV_GRS)
AS REV_GRS_Sum, Sum([SGMT_REV_BY_SITE].REV_NET) AS REV_NET_Sum, IIf(NUM_SITES >0, REV_GRS_Sum/NUM_SITES, REV_GRS_Sum) AS ARPSg_Sum, IIf(NUM_SITES >0, 
REV_NET_Sum/NUM_SITES, REV_NET_Sum) AS ARPSn_Sum
FROM SGMT_REV_BY_SITE
WHERE ([SGMT_REV_BY_SITE].SGMNT1="Small"
Or [SGMT_REV_BY_SITE].SGMNT1="Medium")
And [SGMT_REV_BY_SITE].PERIOD>#12/31/2013#
And [SGMT_REV_BY_SITE].RECUR=Yes
And [SGMT_REV_BY_SITE].PROMOTED=Yes
And [SGMT_REV_BY_SITE].REV_NET<>0
GROUP BY [SGMT_REV_BY_SITE].GLSeq, [SGMT_REV_BY_SITE].LOB$, [SGMT_REV_BY_SITE].SGMNT1, [SGMT_REV_BY_SITE].SGMNT2, [SGMT_REV_BY_SITE].PERIOD, [SGMT_REV_BY_SITE].RECUR, [SGMT_REV_BY_SITE].PROMOTED;
Is there an easy way of accomplishing the task.
Thanks in advance for help.

ARSagit,
Unfortunatly access don't support count(distinct fieldname) statement...
Workaround is:
SELECT [NS].glseq,
Count([NS].site_addr_id) AS NUM_SITES,
[NS].sgmnt1,
[NS].sgmnt2,
[NS].lob$,
[NS].period,
[NS].recur,
[NS].promoted,
FROM (
SELECT DISTINCT
[sgmt_rev_by_site].glseq,
[sgmt_rev_by_site].site_addr_id
[sgmt_rev_by_site].sgmnt1,
[sgmt_rev_by_site].sgmnt2,
[sgmt_rev_by_site].lob$,
[sgmt_rev_by_site].period,
[sgmt_rev_by_site].recur,
[sgmt_rev_by_site].promoted,
FROM
sgmt_rev_by_site
WHERE [sgmt_rev_by_site].sgmnt1 in ("small","medium")
AND [sgmt_rev_by_site].period >#12/31/2013#
AND [sgmt_rev_by_site].recur = yes
AND [sgmt_rev_by_site].promoted = yes
AND [sgmt_rev_by_site].rev_net <>0) AS NS
GROUP BY [NS].glseq,
[NS].lob$,
[NS].sgmnt1,
[NS].sgmnt2,
[NS].period,
[NS].recur,
[NS].promoted;
With this quer you can join with main query and show num_sites....
Michał

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    SELECT @ErrorFromProc = ERROR_PROCEDURE()
    ,@ErrorMessage = ERROR_MESSAGE()
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    -- ErrorFromProc
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    Anna     68     6/4/2005 8:00:00.000 PM     4
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    Anna     20     6/6/2005 8:00:00.000 PM     4
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    Bill     221     6/3/2005 8:00:00.000 PM     3
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             5          1          4
             6         16          5
             7         16          5
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    Message was edited by:
    Laurent Schneider
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