从SQL 2000到SQL 2008

Question

I have a query in SQL 2000 DB and I need to migrate it to SQL 2008 DB. It works fine in SQL2000 and I j't need to revamp it into SQL2008. Below is the query in SQL2000. Please guide me how can we overload *= , =* clause in ON clause.

SELECT tblacc. *
FROM   tblacc,
       tblst,
       tblreceipt,
       tblrtemp,
       tblitem
WHERE  tblacc.rkey = tblreceipt.rkey
       AND tblacc.stkey = tblst.stkey
       AND tblacc.stkey *= tblrtemp.stkey
       AND tblacc.stkey *= tblitem.stkey
       AND tblacc.itkey *= tblitem.itkey
       AND tblrtemp.rkey =* tblreceipt.rkey 

Answer 1

*= is a left Join

=* is a right Join

Have you tried bringing it up in the SQL Editor in SQL Server Management Studio? It might convert it for you.

Answer 2

It's not quite clear what you mean by "overload *= , =* clause in ON clause", unfortunately. I can see one problem, however: you are using the old-style syntax for outer joins. You should replace this syntax by the new "ANSI SQL" syntax . This uses keywords rather than *= and =* , and moves the join condition into the FROM clause:

• WHERE ax *= by becomes FROM a LEFT OUTER JOIN b ON ax = by
• WHERE ax =* by becomes FROM a RIGHT OUTER JOIN b ON ax = by
• There is also FROM a FULL OUTER JOIN b ON ax = by , which pads un-matched tuples from either table with NULLs.

The old syntax has been deprecated since SQL Server 2005 because it was non-standard and prone to introducing ambiguity. It is not available on databases running in SQL Server 2005 or later compatibility mode, which is likely the source of your problem.

Answer 3

SELECT tblacc.*
FROM   tblacc
  INNER JOIN tblreceipt ON tblacc.rkey = tblreceipt.rkey
  INNER JOIN tblst      ON tblacc.stkey = tblst.stkey
  LEFT JOIN  tblitem    ON tblacc.stkey = tblitem.stkey
                       AND tblacc.itkey = tblitem.itkey
  LEFT JOIN  tblrtemp   ON tblacc.stkey = tblrtemp.stkey
                       AND tblrtemp.rkey = tblreceipt.rkey

Answer 4

I believe the query should be something like below, though I don't know if you want to do an INNER JOIN and a RIGHT JOIN with the table tblreceipt .

SELECT tblacc.*
FROM   tblacc
JOIN   tblreceipt
    ON tblacc.rkey = tblreceipt.rkey
JOIN   tblst
    ON tblacc.stkey = tblst.stkey
LEFT JOIN tblrtemp
    ON tblacc.stkey = tblrtemp.stkey
LEFT JOIN tblitem
    ON tblacc.stkey = tblitem.stkey AND tblacc.itkey = tblitem.itkey
RIGHT JOIN tblreceipt
    ON tblrtemp.rkey = tblreceipt.rkey