I Need Fresh Eyes On A Simple Sql Query

greets, im coding a few queries to a table. im storing sets of records into the table, each set of records will haev a different batch id. so basically 2 sets of records can occupy this table at the same time, and their batch id is the main key (with 2 other fields also being PKs). i want to compare the 2 sets in the same table and get the differences:
1. records that were added
2. records that were updated
3. records that were deleted

ive written queries for the added records, and the updated records but i cant get the query for finding deleted records. the logic looks good to me but im obviously missing something so i could use a fresh pair of eyes.
here is the table def:

Code:


CREATE TABLE [dbo].[UPCXREF_BATCH] (
[BATCH_ID] [char] (10) COLLATE SQL_Latin1_General_CP1_CI_AS NOT NULL ,
[CHAIN_CODE] [char] (5) COLLATE SQL_Latin1_General_CP1_CI_AS NOT NULL ,
[UPC] [char] (16) COLLATE SQL_Latin1_General_CP1_CI_AS NOT NULL ,
[ITM_CODE] [char] (6) COLLATE SQL_Latin1_General_CP1_CI_AS NULL ,
[ITM_CATEGORY] [char] (2) COLLATE SQL_Latin1_General_CP1_CI_AS NULL ,
[CREATE_DATE] [datetime] NULL
) ON [PRIMARY]
GO

ALTER TABLE [dbo].[UPCXREF_BATCH] WITH NOCHECK ADD
CONSTRAINT [PK_UPCXREF_BATCH] PRIMARY KEY CLUSTERED
(
[BATCH_ID],
[CHAIN_CODE],
[UPC]
) ON [PRIMARY]
GO



and here are the queries ive gotten so far

Code:


/* This section retrieves all UPDATED records */
SELECT 'U' as FLAG, b2.CHAIN_CODE as CHAIN_CODE, b2.UPC, b2.ITM_CODE, b2.ITM_CATEGORY
FROM UPCXREF_BATCH b2 INNER JOIN UPCXREF_BATCH b1
ON b2.CHAIN_CODE=b1.CHAIN_CODE
AND b2.UPC=b1.UPC
AND (b2.ITM_CODE<>b1.ITM_CODE OR b2.ITM_CATEGORY <> b1.ITM_CATEGORY )
WHERE b2.BATCH_ID='BTC0002' AND b1.BATCH_ID='BTC0001'



/* This section retrieves all NEW records */

SELECT 'A' as FLAG, CHAIN_CODE, UPC, ITM_CODE, ITM_CATEGORY
FROM UPCXREF_BATCH
WHERE BATCH_ID='BTC0002'
AND (CHAIN_CODE NOT IN (SELECT CHAIN_CODE FROM UPCXREF_BATCH WHERE BATCH_ID='BTC0001')
OR UPC NOT IN (SELECT UPC FROM UPCXREF_BATCH WHERE BATCH_ID='BTC0001'))




here was my attempt to get deleted records which looks like it makes sense but isnt working

Code:


SELECT 'D' as FLAG, CHAIN_CODE, UPC, ITM_CODE, ITM_CATEGORY
FROM UPCXREF_BATCH
WHERE BATCH_ID='BTC0001'
AND CHAIN_CODE NOT IN (SELECT CHAIN_CODE FROM UPCXREF_BATCH WHERE BATCH_ID='BTC0002')
AND UPC NOT IN (SELECT UPC FROM UPCXREF_BATCH WHERE BATCH_ID='BTC0002')



here batch 'BTC0001' is the older set of records that already existed and batch 'BTC0002' is the new set we just inserted into the table. am i missing something else?