Can I Merge a table with itself ?

Bishman,
select
a.c1,
case b.c1
when 1 then a.c2
when 2 then a.c3
when 3 then a.c4
end as new_c2
from
dbo.t1 as a cross join (select 1 as c1 union all select 2 union all
select 3) as b
go
-- or
select c1, c2 as new_c2
from dbo.t1
union all
select c1, c3
from dbo.t1
union all
select c1, c4
from dbo.t1
go
AMB
"Bishman" wrote:

> Hi,
> I have a table which contains several integer columns that represent
> similiar date related information. ie
> RenewalMonthDay,HomeMonthDay,MotorMonthDay etc.
> I need a view of the table where these different columns have been merged
> into a single column, so where there was one row with x number of integers,
> I would have X number of rows with a single integer. Is this possible ?
> What I am actually wanting to do is sort the rows based on the value that is
> highest / lowest from the values in the row.
> Can this be done ?
> Thanks,
> Jon.
>
>
Bishman,
If you are working with 2005, then you can also use new operator "unpivot".
create table dbo.t1 (
a int not null identity unique,
b int,
c int,
d int
)
go
insert into dbo.t1(b, c, d) values(10, 20, 30)
insert into dbo.t1(b, c, d) values(40, 50, 60)
go
select
a, val
from
(
select a, b as c1, c as c2, d as c3
from dbo.t1
) as pvt
unpivot
(val for c in (c1, c2, c3)) as unpvt
go
drop table dbo.t1
go
AMB
"Alejandro Mesa" wrote:
[vbcol=seagreen]
> Bishman,
> select
> a.c1,
> case b.c1
> when 1 then a.c2
> when 2 then a.c3
> when 3 then a.c4
> end as new_c2
> from
> dbo.t1 as a cross join (select 1 as c1 union all select 2 union all
> select 3) as b
> go
> -- or
> select c1, c2 as new_c2
> from dbo.t1
> union all
> select c1, c3
> from dbo.t1
> union all
> select c1, c4
> from dbo.t1
> go
>
> AMB
> "Bishman" wrote: