Question

Does anyone know what is wrong with this query?

 SELECT DISTINCT c.CN as ClaimNumber,           a.ItemDate as BillReceivedDate, c.DTN as  DocTrackNumber          FROM ItemData a,          ItemDataPage b,          KeyGroupData c          WHERE a.ItemTypeNum in (112, 113, 116, 172, 189)          AND a.ItemNum = b.ItemNum          AND b.ItemNum = c.ItemNum          ORDER BY a.DateStored DESC; 

I have done T-Sql most of my career and this looks correct to me, however this query is for an Oracle database and Toad just places the cursor on the a.DateStored in the Order By section. I’m sure this is elementary for anyone doing PL/SQL.

Thanks!

[EDIT] For future reference, the error given by SQL*Plus was: ‘ORA-01791: not a SELECTed expression’

Answer 1

You will need to modify the query as such:

SELECT DISTINCT c.CN as ClaimNumber,           a.ItemDate as BillReceivedDate, c.DTN as  DocTrackNumber, a.DateStored          FROM ItemData a,          ItemDataPage b,          KeyGroupData c          WHERE a.ItemTypeNum in (112, 113, 116, 172, 189)          AND a.ItemNum = b.ItemNum          AND b.ItemNum = c.ItemNum          ORDER BY a.DateStored DESC; 

When doing a DISTINCT your order by needs to be one of the selected columns.