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return min value

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eugz
Posting Yak Master

210 Posts

Posted - 2010-08-05 : 15:10:23

Hi All.
How to return MIN vallue for CODE field of JOIN two tables?
What I mean. For instance:
select a.Emp_Id, Code
from Table1 a
join table2 b
on a.Emp_Id = b.Emp_Id

if return is:
2 12.51
2 54.3
2 3.25
6 57.6
9 101.3
6 12.1

My question is, how to get result like:
2 3.25
6 12.1
9 101.3

Thanks.

tkizer
Almighty SQL Goddess

38200 Posts

Posted - 2010-08-05 : 15:15:53

Sounds like a homework question, but I'll bite:

select a.Emp_Id, MIN(Code) AS MinCode
from Table1 a
join table2 b
on a.Emp_Id = b.Emp_Id
group by a.Emp_Id

Tara Kizer
Microsoft MVP for Windows Server System - SQL Server
http://weblogs.sqlteam.com/tarad/

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eugz
Posting Yak Master

210 Posts

Posted - 2010-08-10 : 17:00:49

Thanks for replay.

Now I need to use your select like subselect in other SELECT statment. My target is to display new fields including CODE field witch is MIN in subselect.

select
v.Visit_Id
,Convert(varchar(10),Svc_Date,101) Svc_Date
,Adm_No
,FName
,LName
,(select a.Emp_Id, MIN(Code) AS MinCode
from Table1 a
join table2 b
on a.Emp_Id = b.Emp_Id
group by a.Emp_Id) Code
,Submit
from Table3 v
join dbo.Table4 p
on v.AAA_id = p.AAA_id
left outer join Table2 vd
on v.Emp_Id = vd.Emp_Id

If know other way to get same result I will appreciate for help.

Thanks.

madhivanan
Premature Yak Congratulator

22864 Posts

Posted - 2010-08-11 : 05:01:10

See if this works

select t1.* from table1 as t1 inner join
(
select emp_id, min(code) as code from table2
group by emp_id
) as t2
on t1.emp_id=t2.emp_id and t1.code=t2.code

Madhivanan

Failing to plan is Planning to fail

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