Distinct Data but order by on Priority Column Which is not present in select result.

Question

Distinct Data but order by on Priority Column Which is not present in select result.

Turbo_23

SSC Veteran

Points: 292
More actions
December 26, 2012 at 5:27 am

#286798

Hi,
Can you please help me how to get result in following format :-
Scenario is three tables :-
Client Table
----------------
autClientIdvchName
1-----------C1
2-----------C2
3-----------C3
Order Table :- Each Client has multiple Order
----------------
autOrderIdintClientIdvchOrderName
1-----------1----------- O1
2-----------1----------- O2
3-----------2----------- O3
5-----------2----------- O4
7-----------3----------- O5
8-----------3----------- O6
OrderInformation Table :- Each Order has multiple Information
-------------------------------------------------------------
autOrderXmlId intOrderId vchOrderXmlName intPriority
1----------- 1----------- OX1----------- 7
2----------- 1----------- OX2----------- 1
3----------- 2----------- OX3----------- 9
4----------- 2----------- OX4----------- 3
5----------- 3----------- OX5----------- 4
6----------- 5----------- OX6----------- 2
7----------- 7----------- OX7----------- 5
8----------- 7----------- OX8----------- 8
9----------- 8----------- OX9----------- 0
I want distinct clients on the basis of order information priority.
Result Should be Like this :-
-------------------------
vchName
C3
C1
C2
Thanks in Advance.

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Ron McCullough SSC Guru Points: 63877 More actions · Answer 1

In order to receive a rapid answer to your question, it is beholden on you to present your table definition(s), sample data and required answer(s), in a readily consumable format. In other words you should help those who can and will help you.

To do this please click on the first link in my signature block ... the article that will be displayed contains T-SQL statements and instructions in their use ... to make it easy and quick for you to help those who wish to help you.

If everything seems to be going well, you have obviously overlooked something.

Ron

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Sean Lange SSC Guru Points: 286573 More actions · Answer 2

This seems to be a representation of what you are looking for.

create table #Client

(

ClientID int identity,

Name char(2)

)

insert #Client

select 'C1' union all

select 'C2' union all

select 'C3'

create table #Orders

(

OrderID int identity,

ClientID int,

OrderName char(2)

)

insert #Orders

select 1, 'O1' union all

select 1, 'O2' union all

select 2, 'O3' union all

select 2, 'O4' union all

select 3, 'O5' union all

select 3, 'O6'

create table #OrderInfo

(

OrderInfoID int identity,

OrderID int,

Priority int

)

insert #OrderInfo

select 1, 7 union all

select 1, 1 union all

select 2, 9 union all

select 2, 3 union all

select 3, 4 union all

select 5, 2 union all

select 7, 5 union all

select 7, 8 union all

select 8, 0

select c.Name

from #OrderInfo oi

join #Orders o on oi.OrderID = o.OrderID

join #Client c on c.ClientID = o.ClientID

group by c.Name

order by max(oi.Priority)

drop table #Client

drop table #Orders

drop table #OrderInfo

Notice how I posted this in a consumable format?

I would HIGHLY recommend you change your naming conventions. You should not use a datatype prefix on your columns. I am assuming that things like "autClientId" and "vchName" mean "AutoNumberClientID" and "VarcharName". Not only does that make it difficult to find your columns, it will cause you untold pain when you have to change a datatype. You will end up with either LOTS of code to rework or prefixes that don't match anymore. Just don't it at all. It may seem like a good idea at first but you will soon realize how horrible that really is.

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