SQL query to retrieve changes

Hi…
Let's say I have 2 tables with id \ loginname

Table A

1 eladr
2 billc
3 tonyu

Table B

1 eladr
2 billca
3 tonyu
4 davidv

I need to write sql query to retrieve only records with changes comparing the tables.
In this case only records 2 and 4 are different (2 is different because of the loginame and 4 is new)

LVL 1
eladrAsked:
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Guy Hengel [angelIII / a3]Billing EngineerCommented:
please try this:

select *
from tableB b
left join tableA a
  on a.id = b.id
  and a.name <> b.name
0
LowfatspreadCommented:
select  case when a.id is null then 'New b'
                   when b.id is null then 'New A'
                   else 'Change'
                   end as Type
          ,coalesce(a.id,b.id) as id
          ,a.loginname
          ,b.loginname
from tablea As a
full outer join tableb as b
 on a.id=b.id
Where (a.id is null
              or b.id is null )
       or (A.ID=B.ID AND NOT (A.NAME IS NULL AND B..NAME IS NULL) AND A.NAME <> B.NAME)
0

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TheSloathCommented:
You need to have a subquery that creates a unique list of all the ID's first, then LEFT JOIN that to the 2 tables and pick up the nulls or differences. E.G. with TableA and Table B, fields ID and Name:

Select TableIDList.ID, TableA.Name As NameA, TableB.Name As NameB
FROM ((SELECT ID FROM TableA
UNION
SELECT ID FROM TableB) As TableIDList LEFT JOIN TableA ON TableIDList.ID = TableA.ID) LEFT JOIN TableB ON TableIDList.ID = TableB.ID
WHERE TableA.Name <> TableB.Name OR TableA.Name IS NULL OR TableB.Name IS NULL
0
TheSloathCommented:
Sorry - I thought this post came from the MS Access forum,which does not support the FULL OUTER JOIN in it's SQL. If the database system you are using supports the FULL OUTER JOIN that would be best...
0
eladrAuthor Commented:
10x
0
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