How to join tables with 0 count rows.

I have two tables.
1.geotable - It contains source,state and district.
There are total 48 districts. This is master table.
2.mstchvs - Here data entry is done and source,state district fields are there for every records.

I want the following summary
State,District,source,Total_count as 'No. of enteries'
The query should display 0 for those records which doesnot exists for a given condition of dates.

select geotable.state,geotable.district,geotable.source,count(*)
from geotable
left join mstchvs
ON geotable.state=mstchvs.state and geotable.district=mstchvs.district and geotable.source=mstchvs.source
where flagr=1 and rfeeddate>='2012-1-1' and rfeeddate<='2012-3-31'
group by geotable.state,geotable.district,geotable.source
order by 1 asc,2 asc ,3 asc

This query return only those rows where record exists.
searchsanjaysharmaAsked:
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appariCommented:
try this

select geotable.state,geotable.district,geotable.source,count(mstchvs.*)
from geotable
left join mstchvs
ON geotable.state=mstchvs.state and geotable.district=mstchvs.district and geotable.source=mstchvs.source
and flagr=1 and rfeeddate>='2012-1-1' and rfeeddate<='2012-3-31'
group by geotable.state,geotable.district,geotable.source
order by 1 asc,2 asc ,3 asc
0
searchsanjaysharmaAuthor Commented:
Error in mstchvs.*
0
gplanaCommented:
You should use LEFT JOIN when you want all records on the left table. In this case, all values on the right table will be set to null on the result of the query.

Try this:

SELECT g.state, g. g.district, g.source, count(*)
FROM geotable g
LEFT JOIN mstchvs m
ON g.state=m.state AND g.district=m.district AND g.source=m.source
AND m.flagr =1 AND m.rfeeddate BETWEEN '2012-1-1' AND '2012-3-31'
GROUP BY g.state, g.district, g.source
ORDER BY g.state, g. g.district, g.source

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0

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searchsanjaysharmaAuthor Commented:
Sorry, geotable contains only state,district and source.
0
gplanaCommented:
I have edited my query. Try now.

I think actually there is a small error: instead of count(*) you should put count(m.district) or any field on table mstchvs that is NOT NULL
0
searchsanjaysharmaAuthor Commented:
I am getting the out without this query, now how to get the cumulative output also
State District Source Count Cum.Count


select geotable.state,geotable.district,geotable.source,sum(isnull(mstchvs.flagr,0))
from geotable
left join mstchvs
ON geotable.state=mstchvs.state and geotable.district=mstchvs.district and geotable.source=mstchvs.source
and flagr=1 and rfeeddate>='2012-3-1' and rfeeddate<='2012-3-31'
group by geotable.state,geotable.district,geotable.source
order by 1,2,3
0
searchsanjaysharmaAuthor Commented:
ok
0
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