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Conrado ZAVALA
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How can I include missing records of two tables

Dear Experts-Exchange:

I have the following two tables:

Table #1: CUSTOMER_POSIZES
Columns: COMPANY_ID,CUSTOMER_ID,CUSTOMERSTYLE_ID,CUSTOMERPO_ID,CUSTOMERSIZE_ID
Row #1: 0,8,'GARMENT #3',2,'6'
Row #2: 0,8,'GARMENT #3',2,'XS'
Row #3: 0,8,'GARMENT #3',2,'S'
Row #4: 0,8,'GARMENT #3',2,'M'

and

Table #2: CUSTOMER_SIZESPSTYLE
Columns: COMPANY_ID,CUSTOMER_ID,CUSTOMERSTYLE_ID,CUSTOMERSIZE_ID
Row #1: 0,8,'GARMENT #3','XS'
Row #2: 0,8,'GARMENT #3','S'
Row #3: 0,8,'GARMENT #3','M'
Row #4: 0,8,'GARMENT #3','L'

Notice that CUSTOMERSIZE_ID = '6' is not present in CUSTOMER_SIZESPSTYLE list.

I need to write an SQL SELECT that can give me the following result set:

Row #1: '6'
Row #2: 'XS'
Row #3: 'S'
Row #4: 'M'
Row #5: 'L'

I will appreciate your help.

Best regards,

Conrado
Microsoft SQL ServerMicrosoft SQL Server 2008

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Conrado ZAVALA

8/22/2022 - Mon
Neil Russell

Please define WHY you expect that output? You dont explain why you want the output specified. It displays 5 rows, what are the 5 rows?

You need to explain the logic behind WHY you expect to get that output. We could guess but then you may end up with a statement that works on THAT set of data but not on others.
ASKER CERTIFIED SOLUTION
Simon

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Ludo Van den Bosch

I don't agree with you. Your result would give:

Row #1: '6'
Row #2: 'XS'
Row #3: 'S'
Row #4: ,'M'
Row #5: 'XS'
Row #6: 'S'
Row #7: 'M'
Row #8: 'L'

because you first do a distinct on the seperate tables and then you union them together.

I think the following query is the correct one:

select distinct CUSTOMERSIZE_ID from (
select CUSTOMERSIZE_ID from CUSTOMER_POSIZES
union
select CUSTOMERSIZE_ID from CUSTOMER_SIZESPSTYLE
)

I first union them and then distinct the selection
Simon

@Ludo - UNION removes duplicates, UNION ALL does not. That's why I used the former.
UNION (Transact-SQL)
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William Peck
Conrado ZAVALA

ASKER
Thank you SimonAdept for providing a solution to my case.  With your recommendation, I ended up building the following SQL SELECT:

SELECT B.SORT_ORDER, A.CUSTOMERSIZE_ID, C.QUANTITY, C.QUANTITYALLOW FROM CUSTOMER_SIZESPSTYLE A
INNER JOIN CUSTOMER_SIZES B ON A.COMPANY_ID = B.COMPANY_ID AND A.CUSTOMER_ID = B.CUSTOMER_ID AND A.CUSTOMERSIZE_ID = B.CUSTOMERSIZE_ID
LEFT JOIN CUSTOMER_POSIZES C ON A.COMPANY_ID = C.COMPANY_ID AND A.CUSTOMER_ID = C.CUSTOMER_ID AND A.CUSTOMERSTYLE_ID = C.CUSTOMERSTYLE_ID AND A.CUSTOMERSIZE_ID = C.CUSTOMERSIZE_ID
WHERE
      A.COMPANY_ID = 0 AND
      A.CUSTOMER_ID = 8 AND
      A.CUSTOMERSTYLE_ID = 'GARMENT #3'
UNION
SELECT B.SORT_ORDER, A.CUSTOMERSIZE_ID, A.QUANTITY, A.QUANTITYALLOW FROM CUSTOMER_POSIZES A
INNER JOIN CUSTOMER_SIZES B ON A.COMPANY_ID = B.COMPANY_ID AND A.CUSTOMER_ID = B.CUSTOMER_ID AND A.CUSTOMERSIZE_ID = B.CUSTOMERSIZE_ID
WHERE
      A.COMPANY_ID = 0 AND
      A.CUSTOMER_ID = 8 AND
      A.CUSTOMERPO_ID = 2 AND
      A.CUSTOMERSTYLE_ID = 'GARMENT #3' AND
      A.COLOR_ID = 'CARD. RED'
ORDER BY SORT_ORDER

Now, I am getting the output I need in my program :)

I also want to thank Neilsr and Ludo Van den Bosch for getting involved in this case.  I highly appreciate everyone's help.

Thank you all,

Conrado