If you could post some consumable ddl and sample data this would be a lot easier. There is no way based on what you posted that you are getting those results. Not only is it impossible to have duplicates (you used distinct AND a group by) effectively ensuring no duplicates twice, you also would have NULL, NULL and 8, 300.00.

I think you have obfuscated the real data to a point that your example is not an accurate representation of the actual details.

Here is something similar to your posted tables and data.

create table #tblBank

(

Store int,

Amount decimal(9,2)

)

insert #tblBank

select 15, 400.00 union all

select 21, 900.00 union all

select 27, 300.00 union all

select 29, 500.00

create table #tblBook

(

Store int,

Amount decimal(9,2)

)

insert #tblBook

select 8, 300.00 union all

select 15, 400.00 union all

select 15, 400.00 union all

select 21, 600.00 union all

select 27, 300.00 union all

select 27, 300.00 union all

select 29, 700.00 union all

select 30, 100.00

Then I had to modify your query because of the syntax errors so I came up with this. (Your query referenced an alias that isn't in the code you posted)

SELECT DISTINCT

Book.Store, Book.Amount

FROM #tblBank Bank

LEFT JOIN #tblBook Book ON Bank.Amount = Book.Amount

GROUP BY book.Store, book.Amount;

--EDIT--

Seems that Nevyn posted much the same results as me while I was posting.