Question

summarize, remove duplicates

Asked by: SweatCoder

This question is related to:

http://www.experts-exchange.com/Microsoft/Development/MS-SQL-Server/Q_23243164.html

In the last post I got a good solution to my problem UNTIL I added more cols to the select, which forced me to add the same cols to group by, at which time I started getting "duplicate" records again. I'm defining duplicate as seeing the same CustID two or more times in a single resultset.

In the resultset below (extracted from a larger resultset), there are 4 records, but I only want 1 record. I want the record that has the latest datestamp in EITHER AddressCreate or PhoneCreate. That is the ideal. If that is really tough to do, then just the latest in either column (not compared across columns). But the most important thing is that (1) I only get a single record per custid and (2) I get the latest record per AddressCreate or PhoneCreate. And if I could get the latest comparing those 2 columns with each other, that would be the ultimate solution.

My latest query, based on previous solution, but with added SELECT items (giving me duplicates) is:

SELECT top 100 m.CustID, MAX(a.dtStamp) AS AddressCreate, MAX(p.dtStamp) AS PhoneCreate, m.FirstName, m.LastName, a.Address1, a.City, a.State, a.Zip, p.PhoneNumber AS Phone
FROM Member m (nolock)
JOIN Address a (nolock)
ON m.CustID = a.CustID
JOIN Phone p (nolock)
ON m.CustID = p.CustID
JOIN Customer c (nolock)
ON c.CustID = m.CustID
WHERE (c.CompanyID = 1 OR c.CompanyID IS NULL)
AND m.LastName = 'Foo'
AND m.Active = 1
AND m.[Primary] = 1
GROUP BY m.CustID, m.LastName, m.FirstName, a.Address1, a.City, a.State, a.Zip, p.PhoneNumber
ORDER BY m.CustID

CustID	AddressCreate     PhoneCreate	FN       LN      ADDR	         City	ST	Zip	Phone
==========================================================================================================
00041646	2005-05-01 00:23	2005-04-30 22:34	Jill   	Foo     47 Foobar AVE.	Ina	AK	45590	5872853239
00041646	2005-05-01 00:23	2005-04-30 22:24	Jill  	Foo     47 Foobar AVE.	Ina	AK	45590	6054348877
00041646	2005-04-30 22:55	2005-04-30 22:34	Jill   	Foo     91 Zoobar LN.	DNP	HI	77742	5872853239
00041646	2005-04-30 22:55	2005-04-30 22:24	Jill   	Foo     91 Zoobar LN.	DNP	HI	77742	6054348877

                                  
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Asked On
2008-03-17 at 13:46:01ID23248426
Topic

MS SQL Server

Participating Experts
2
Points
500
Comments
11

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Answers

 

by: BriCrowePosted on 2008-03-17 at 14:10:03ID: 21146177

Scott probably had the better solution in your last post based on this new information.  You'll have to use subqueries to obtain the "table of latest phone/address entries by customer" to join against.  This eliminates the need for grouping.  Try this and let me know if it works.

SELECT TOP 100 m.CustID,
      MAX(a.dtStamp) AS AddressCreate,
      MAX(p.dtStamp) AS PhoneCreate,
      m.FirstName,
      m.LastName,
      a.Address1,
      a.City,
      a.State,
      a.Zip,
      p.PhoneNumber AS Phone
FROM Member m (nolock)
INNER JOIN (SELECT * FROM Address WHERE dtStamp =
      (SELECT MAX(dtStamp) FROM Address AS B WHERE B.CustID = Address.CustID) AS a (nolock)
      ON m.CustID = a.CustID
INNER JOIN (SELECT * FROM Phone WHERE dtStamp =
      (SELECT MAX(dtStamp) FROM Phone AS B WHERE B.CustID = Phone.CustID) AS p (nolock)
      ON m.CustID = p.CustID
INNER JOIN Customer c (nolock)
      ON c.CustID = m.CustID
WHERE ISNULL(c.CompanyID, 1) = 1
      AND m.LastName = 'Foo'
      AND m.Active = 1
      AND m.[Primary] = 1
ORDER BY m.CustID

 

by: BriCrowePosted on 2008-03-17 at 14:11:19ID: 21146189

I left out the closing parentheses...

SELECT TOP 100 m.CustID,
      MAX(a.dtStamp) AS AddressCreate,
      MAX(p.dtStamp) AS PhoneCreate,
      m.FirstName,
      m.LastName,
      a.Address1,
      a.City,
      a.State,
      a.Zip,
      p.PhoneNumber AS Phone
FROM Member m (nolock)
INNER JOIN (SELECT * FROM Address WHERE dtStamp =
      (SELECT MAX(dtStamp) FROM Address AS B WHERE B.CustID = Address.CustID)) AS a (nolock)
      ON m.CustID = a.CustID
INNER JOIN (SELECT * FROM Phone WHERE dtStamp =
      (SELECT MAX(dtStamp) FROM Phone AS B WHERE B.CustID = Phone.CustID)) AS p (nolock)
      ON m.CustID = p.CustID
INNER JOIN Customer c (nolock)
      ON c.CustID = m.CustID
WHERE ISNULL(c.CompanyID, 1) = 1
      AND m.LastName = 'Foo'
      AND m.Active = 1
      AND m.[Primary] = 1
ORDER BY m.CustID

 

by: SweatCoderPosted on 2008-03-17 at 14:16:12ID: 21146244

Bri, I'm getting syntax errors on these 2 lines:

      (SELECT MAX(dtStamp) FROM Address AS B WHERE B.CustID = Address.CustID) AS a (nolock)
      (SELECT MAX(dtStamp) FROM Phone AS B WHERE B.CustID = Phone.CustID) AS p (nolock)

Error:
Msg 156, Level 15, State 1, Line 13
Incorrect syntax near the keyword 'AS'.
Msg 156, Level 15, State 1, Line 16
Incorrect syntax near the keyword 'AS'.

At first I thought maybe the nolock hints were in the wrong place, so I tried moving those around, but to no avail. Any idea what the problem is?

 

by: SweatCoderPosted on 2008-03-17 at 14:18:40ID: 21146259

Ok, I see your latest query...and now I'm getting a different error:

Msg 8158, Level 16, State 1, Line 1
'a' has more columns than were specified in the column list.

Ideas?

 

by: BriCrowePosted on 2008-03-17 at 14:50:59ID: 21146492

Try explicitly listing the columns you want to pull from the Address and Phone tables instead of the "*" wildcard.

 

by: SweatCoderPosted on 2008-03-17 at 14:55:56ID: 21146535

I made some tweaks and I'm still getting the same error. I'm not sure how to solve this. In the Address and Phone selects, I tried the select list with and without the dtstamp field, but I got the same error either way: "'a' has more columns than were specified in the column list."

SELECT TOP 100 m.CustID,
      MAX(a.dtStamp) AS AddressCreate,
      MAX(p.dtStamp) AS PhoneCreate,
      m.FirstName,
      m.LastName,
      a.Address1,
      a.City,
      a.State,
      a.Zip,
      p.PhoneNumber AS Phone
FROM Member m (nolock)
INNER JOIN (SELECT dtStamp,Address1,City,State,Zip FROM Address WHERE dtStamp =
      (SELECT MAX(dtStamp) FROM Address AS B WHERE B.CustID = Address.CustID)) AS a (nolock)
      ON m.CustID = a.CustID
INNER JOIN (SELECT dtStamp,PhoneNumber FROM Phone WHERE dtStamp =
      (SELECT MAX(dtStamp) FROM Phone AS B WHERE B.CustID = Phone.CustID)) AS p (nolock)
      ON m.CustID = p.CustID
INNER JOIN Customer c (nolock)
      ON c.CustID = m.CustID
WHERE ISNULL(c.CompanyID, 1) = 1
      AND m.LastName = 'Foo'
      AND m.Active = 1
      AND m.[Primary] = 1
ORDER BY m.CustID

 

by: SweatCoderPosted on 2008-03-18 at 09:58:59ID: 21153172

Bri,

Any add'l thoughts on this? It seems we're really close but something's wrong with the syntax and I am anxious to get this working and award you points. :-)

--SweatCoder

 

by: ScottPletcherPosted on 2008-03-18 at 11:30:32ID: 21154267

>> I want the record that has the latest datestamp in EITHER AddressCreate or PhoneCreate. That is the ideal. <<

I was, and still am, somewhat unsure on *specifically* what you want in the output.

I would have figured you wanted whatever address was the last address and whatever phone was the last phone, even if those two dates are different.  Is that what you want?  Or do you want *only* the *last* one that changed??


At any rate, pls try this and see if you gives you close to what you need:


SELECT TOP 100
    m.CustID, a.AddressCreate, p.PhoneCreate, m.FirstName, m.LastName,
    a2.Address1, a2.City, a2.State, a2.Zip, p2.PhoneNumber
FROM Member m
JOIN (
    SELECT CustID, MAX(dtStamp) AS AddressCreate
    FROM Address WITH (nolock)
    GROUP BY CustID
) AS a
ON m.CustID = a.CustID
JOIN Address a2
ON m.CustID = a2.CustID AND a.AddressCreate = a2.dtStamp
JOIN (
    SELECT CustID, MAX(dtStamp) AS PhoneCreate
    FROM Phone WITH (nolock)
    GROUP BY CustID
) AS p
ON m.CustID = p.CustID
JOIN Phone p2
ON m.CustID = p.CustID AND p.PhoneCreate = p2.dtStamp
WHERE m.LastName = 'Foo'
AND m.Active = 1
AND m.[Primary] = 1

 

by: SweatCoderPosted on 2008-03-18 at 12:59:39ID: 21155130

Scott, I ran your query and it runs successfully, but I'm getting massive duplication, in fact all the same record, same custid in each.

To answer your question, I'd like the record with the latest AddressCreate or PhoneCreate relative to each other. Example: If I have 2 records with the same custid and one has an AddressCreate of '1/1/2005' and a PhoneCreate of '1/1/2006' -- and the other record has an AddressCreate of '1/1/2004' and a PhoneCreate of '1/1/2007'  -- I'd want the record with the '1/1/2007'. I don't care whether that latest date came from phone or address, I just want the latest in either case.

I hope this helps. Thanks for taking a look.

20120131-EE-VQP-002

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