Question

I’ve searched around a bit and couldn’t find anything that addressed my exact issue

I have a table (MSSQL), and the data looks like this:

Source table:

RID    FullName FirstName   LastName    Email               Address
-------------------------------------------------------------------------------
1      NULL     [BOB]       NULL        NULL                NULL
1      NULL     NULL        [BOB]       NULL                NULL
1      NULL     NULL        NULL        [[e-mail]]       NULL
2      NULL     [JAY]       NULL        NULL                NULL
2      NULL     NULL        [JAY]       NULL                NULL
2      NULL     NULL        NULL        [[e-mail]]   NULL
3      NULL     [RICK]      NULL        NULL                NULL
3      NULL     NULL        [RICK]      NULL                NULL
3      NULL     NULL        NULL        [[e-mail]]     NULL

But I need to transform the data to look like this:

Results table:

RID     FullName             Email                Address
---------------------------------------------------------
1       [BOB] [BOB]        [[e-mail]]          NULL
2       [JAY] [JAY]        [[e-mail]]      NULL
3       [RICK] [RICK]      [[e-mail]]        NULL

NOTE: If Fullname from the source table is NULL, then we combine FirstName and LastName. (If both FirstName and LastName are NULL, then we simply have a NULL FullName result, which is completely fine).

Thanks in advance for any help on this!

Answer 1

You need a group by:

select rid, coalesce(max(FullName), max(FirstName)+' '+max(LastName)) as FullName,
       max(Email) as Email,
       max(Address) as Address
from t
group by rid
order by 1