How to Identify mismatch values in two columns

Question

I have two tables basically two excel files used by two different depts. I am trying to reconcile dollar amounts between two.
Table A has ID, Amount,Paid Date
Table B has ID,Amount ,Paid Date.
What`s happening is between two tables at times we are finding amount column values differ for same paiddate, there are instances where same transaction recorded in table A will have a different amount but Paid Date will be different. I am trying to find
ID`s which have different amounts.Code below I am trying to find ID`s that exist in both tables and In my where clause I am using where Amount col from Table A is not equal Amount Col in Table B. When I run this code I get I dont see mismatched amounts
select l.id,SUM(l.[amount]),a.amount
FROM SFY14_Detail_Q1 a
inner JOIN dbo.Qtr1_X_Recon l ON l.[id] = a.ID
WHERE l.[amount] <> a.amount and l.[amount] <> 0
group by l.id,a.amount
order by sum(l.[amount]) desc
FM

Answer 1

Chances are, it's because you are grouping by amount.  If you look closer, you'll probably see the same ID twice, once for one amount, and again elsewhere for the other amount.  So by appearing twice, your query is working, it is identifying
the two with different values, but grouping by Amount, you're not seeing them side by side.   You could sort by ID instead, then amount, then they'll show twice, near one another.