How to get records with distinct column value from result set in oracle?

Question

could you please help me on the below query?

Using the query

SELECT LineGernal.Id, LineGernal.Description, LineGernal.SSMS, BaseAddOns.Id
from LineGernal Inner Join
     BaseAddOns
     on LineGernal.Id=BaseAddOns.ParentLineGernalID 

Output-

Result Needed-

Thanks Rajendra

Answer 1

You can use group by and min as follows:

SELECT LineGernal.Id, LineGernal.Description, LineGernal.SSMS, min(BaseAddOns.Id) as id
from LineGernal Inner Join
     BaseAddOns
     on LineGernal.Id=BaseAddOns.ParentLineGernalID 
GROUO BY LineGernal.Id, LineGernal.Description, LineGernal.SSMS

Answer 2

I would recommend pre-aggregation in a subquery:

select li.id as lineGeneralId, lg.description, lg.ssms, bao.id as BaseAddOnsId
from LineGernal lg 
inner join (
    select ParentLineGernalID, min(id) as id
    from BaseAddOns 
    group by ParentLineGernalID, 
) bao on lg.id = bao.ParentLineGernalID