Help!
I'm trying to understand the new ANSI join syntax (after many years of
coding using the old style). I am now working with an application that only
understands ANSI syntax so I am struggling.
My first (old style syntax) SQL statement below produces 60 rows:
SELECT A1.CONTACTID, A1.LASTNAME, A1.FIRSTNAME, A1.ACCOUNT,
A6.CITY, A6.STATE, A1.WORKPHONE, A1.FAX, A1.EMAIL
FROM CONTACT A1,
ADDRESS A6
WHERE A1.ADDRESSID=A6 .ADDRESSID
AND A1.CONTACTID IN
(SELECT A4.CONTACTID
FROM CONTACT_LEADSOU RCE A4,
LEADSOURCE A5
WHERE A4.LEADSOURCEID = A5.LEADSOURCEID
AND A5.DESCRIPTION = 'some_descripti on' )
AND A1.CONTACTID IN
(SELECT A2.CONTACTID
FROM TICKET A2,
ENROLLHX A3,
EVENT A7
WHERE A3.STATUS IN ('R', 'Confirmed')
AND A2.TICKETID = A3.EVXEVTICKETI D
AND A3.EVENTID = A7.EVENTID
AND A7.CODE IN
('AHS00','AHS01 ','AHS02','AHS0 3','AHS04','AHS 98','AHS99'))
ORDER BY A1.LASTNAME ASC
I am trying to convert this to the newer ANSI sytax. My second SQL statement
below produces 67 rows (duplicates):
SELECT A1.CONTACTID, A1.LASTNAME, A1.FIRSTNAME, A1.ACCOUNT,
A6.CITY, A6.STATE, A1.WORKPHONE, A1.FAX, A1.EMAIL
FROM CONTACT A1
JOIN ADDRESS A6 ON (A1.ADDRESSID=A 6.ADDRESSID)
JOIN
( SELECT C.CONTACTID
FROM CONTACT C
JOIN CONTACT_LEADSOU RCE A4 ON (C.CONTACTID
= A4.CONTACTID)
JOIN LEADSOURCE A5 ON (A4.LEADSOURCEI D =
A5.LEADSOURCEID
AND A5.DESCRIPTION =
'some_descripti on' )) AS C1 ON C1.CONTACTID = A1.CONTACTID
JOIN
(SELECT C2.CONTACTID
FROM CONTACT C2
JOIN TICKET A2 ON (C2.CONTACTID =
A2.CONTACTID)
JOIN ENROLLHX A3 ON (A2.TICKETID =
A3.TICKETID AND A3.STATUS in ('R', 'Confirmed'))
JOIN EVENT A7 ON (A3.EVENTID = A7.EVENTID
AND A7.CODE IN ('AHS00','AHS01 ','AHS02','AHS0 3','AHS04','AHS 98','AHS99')))
AS C3 ON C3.CONTACTID = A1.CONTACTID
Can anyone shed some light on what I am missing?
cheers,
Norm
3  2222 
"ColdCanuck " <co**@canuck.ca > wrote in message
news:2lZGc.2076 $iw3.1593@clgrp s13... Help!
I did manage to figure it out. The key was using DISTINCT.
FWIW, my SQL ended up being :
SELECT DISTINCT A1.CONTACTID, A1.LASTNAME, A1.FIRSTNAME, A1.ACCOUNT,
A2.CITY,
A2.STATE, A1.WORKPHONE, A1.FAX, A1.EMAIL
FROM CONTACT A1
JOIN ADDRESS A2 ON (A1.ADDRESSID=A 2.ADDRESSID)
LEFT JOIN CONTACT_LEADSOU RCE A3 ON
(A1.CONTACTID=A 3.CONTACTID)
JOIN TICKET A5 ON (A3.CONTACTID=A 5.CONTACTID)
JOIN ENROLLHX A6 ON (A5.TICKETID=A6 .TICKETID)
JOIN EVENT A7 ON (A6.EVENTID=A7. EVENTID)
LEFT JOIN LEADSOURCE A4 ON
(A3.LEADSOURCEI D=A4.LEADSOURCE ID)
WHERE A4.DESCRIPTION = 'some_descripti on'
AND A7.CODE IN
('AHS00','AHS01 ','AHS02','AHS0 3','AHS04','AHS 98','AHS99')
ORDER BY A1.LASTNAME ASC
ColdCanuck (co**@canuck.ca ) writes: I am trying to convert this to the newer ANSI sytax. My second SQL
statement below produces 67 rows (duplicates):
SELECT A1.CONTACTID, A1.LASTNAME, A1.FIRSTNAME, A1.ACCOUNT,
A6.CITY, A6.STATE, A1.WORKPHONE, A1.FAX, A1.EMAIL
FROM CONTACT A1
JOIN ADDRESS A6 ON (A1.ADDRESSID=A 6.ADDRESSID)
JOIN
( SELECT C.CONTACTID
...
You should have left those IN clauss alone. Or rewritten them as EXISTS
clauses. If you ADDRESS with the subquery, a row from ADDRESS is included
for every time it matches the derived table. You only want it included
once if it matches at all. Whether it matches 1 or ten times is irrelevant
to you.
--
Erland Sommarskog, SQL Server MVP, es****@sommarsk og.se
Books Online for SQL Server SP3 at http://www.microsoft.com/sql/techinf...2000/books.asp
Hi
The join syntax only requires the method that the two tables are being
related to each other, the rest of the where clause can stay the same:
SELECT A1.CONTACTID, A1.LASTNAME, A1.FIRSTNAME, A1.ACCOUNT,
A6.CITY, A6.STATE, A1.WORKPHONE, A1.FAX, A1.EMAIL
FROM CONTACT A1
JOIN ADDRESS A6 ON A1.ADDRESSID=A6 .ADDRESSID
WHERE A1.CONTACTID IN
(SELECT A4.CONTACTID
FROM CONTACT_LEADSOU RCE A4
JOIN LEADSOURCE A5 ON A4.LEADSOURCEID = A5.LEADSOURCEID
WHERE A5.DESCRIPTION = 'some_descripti on' )
AND A1.CONTACTID IN
(SELECT A2.CONTACTID
FROM TICKET A2
JOIN ENROLLHX A3 ON A2.TICKETID = A3.EVXEVTICKETI D
JOIN EVENT A7 ON A3.EVENTID = A7.EVENTID
WHERE A3.STATUS IN ('R', 'Confirmed')
AND A7.CODE IN
('AHS00','AHS01 ','AHS02','AHS0 3','AHS04','AHS 98','AHS99'))
ORDER BY A1.LASTNAME ASC
Without checking I think this may be the same!
SELECT A1.CONTACTID, A1.LASTNAME, A1.FIRSTNAME, A1.ACCOUNT,
A6.CITY, A6.STATE, A1.WORKPHONE, A1.FAX, A1.EMAIL
FROM CONTACT A1
JOIN ADDRESS A6 ON A1.ADDRESSID=A6 .ADDRESSID
JOIN CONTACT_LEADSOU RCE A4 ON A1.CONTACTID = A4.CONTACTID
JOIN LEADSOURCE A5 ON A4.LEADSOURCEID = A5.LEADSOURCEID AND
A5.DESCRIPTION = 'some_descripti on'
JOIN TICKET A2 ON A1.CONTACTID ON A2.CONTACTID
JOIN ENROLLHX A3 ON A2.TICKETID = A3.EVXEVTICKETI D AND A3.STATUS IN ('R',
'Confirmed')
JOIN EVENT A7 ON A3.EVENTID = A7.EVENTID AND A7.CODE IN
('AHS00','AHS01 ','AHS02','AHS0 3','AHS04','AHS 98','AHS99')
ORDER BY A1.LASTNAME ASC
John
"ColdCanuck " <co**@canuck.ca > wrote in message
news:2lZGc.2076 $iw3.1593@clgrp s13... Help!
I'm trying to understand the new ANSI join syntax (after many years of
coding using the old style). I am now working with an application that
only understands ANSI syntax so I am struggling.
My first (old style syntax) SQL statement below produces 60 rows:
SELECT A1.CONTACTID, A1.LASTNAME, A1.FIRSTNAME, A1.ACCOUNT,
A6.CITY, A6.STATE, A1.WORKPHONE, A1.FAX, A1.EMAIL
FROM CONTACT A1,
ADDRESS A6
WHERE A1.ADDRESSID=A6 .ADDRESSID
AND A1.CONTACTID IN
(SELECT A4.CONTACTID
FROM CONTACT_LEADSOU RCE A4,
LEADSOURCE A5
WHERE A4.LEADSOURCEID = A5.LEADSOURCEID
AND A5.DESCRIPTION = 'some_descripti on' )
AND A1.CONTACTID IN
(SELECT A2.CONTACTID
FROM TICKET A2,
ENROLLHX A3,
EVENT A7
WHERE A3.STATUS IN ('R', 'Confirmed')
AND A2.TICKETID = A3.EVXEVTICKETI D
AND A3.EVENTID = A7.EVENTID
AND A7.CODE IN
('AHS00','AHS01 ','AHS02','AHS0 3','AHS04','AHS 98','AHS99'))
ORDER BY A1.LASTNAME ASC
I am trying to convert this to the newer ANSI sytax. My second SQL
statement below produces 67 rows (duplicates):
SELECT A1.CONTACTID, A1.LASTNAME, A1.FIRSTNAME, A1.ACCOUNT,
A6.CITY, A6.STATE, A1.WORKPHONE, A1.FAX, A1.EMAIL
FROM CONTACT A1
JOIN ADDRESS A6 ON (A1.ADDRESSID=A 6.ADDRESSID)
JOIN
( SELECT C.CONTACTID
FROM CONTACT C
JOIN CONTACT_LEADSOU RCE A4 ON
(C.CONTACTID = A4.CONTACTID)
JOIN LEADSOURCE A5 ON (A4.LEADSOURCEI D =
A5.LEADSOURCEID
AND A5.DESCRIPTION =
'some_descripti on' )) AS C1 ON C1.CONTACTID = A1.CONTACTID
JOIN
(SELECT C2.CONTACTID
FROM CONTACT C2
JOIN TICKET A2 ON (C2.CONTACTID =
A2.CONTACTID)
JOIN ENROLLHX A3 ON (A2.TICKETID =
A3.TICKETID AND A3.STATUS in ('R', 'Confirmed'))
JOIN EVENT A7 ON (A3.EVENTID = A7.EVENTID
AND A7.CODE IN ('AHS00','AHS01 ','AHS02','AHS0 3','AHS04','AHS 98','AHS99')))
AS C3 ON C3.CONTACTID = A1.CONTACTID
Can anyone shed some light on what I am missing?
cheers,
Norm
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