Help with cross products and functions

Hello,
I have two tables that i need to join. The first table has a column which
is an encoded addition of one or more values in a second table.
table 1:
col1 col2 col3
1 a b 12
...
table 2:
col1 col2
1 x 4
2 y 8
3 z 16
...
the record for table 1, maps to records 1 and 2 from table 2. I know that
the value 12 in table 1 (col3) mapps to rows 1,2 in table 2 because of this
math function that decodes the encryption.
I have a function that is able to return a table that lists all the values
in table 2 that correspond to the supplied value in table 1..ie if i call
function fn_mappings(12) i get a table called @.result:
table2value
1 4
2 8
what i need to do is then combine these records together to get a view as
follows
col1 col2 table2value
1 a b 4
2 a b 8
...
is this possible to do? i need this to happen for EACH row in table 1 to
find corresponding records in table 2.
thanks for any and all help!
BenIn order to link both tables, I took the liberty of "re-create" a convenient
environment to get the results you asked. I hope it is ok.
Let me know if it works for you
-- Begin Script
create table tbl1
( id int primary key
, col1 varchar(10)
, col2 varchar(10)
, col3 int
)
create table tbl2
(
id int primary key
, fkid int
, col1 varchar(10)
, col2 int
)
insert into tbl1
values (1, 'a', 'b', 12)
insert into tbl2
values (1, 1, 'x', 4)
insert into tbl2
values (2, 1, 'x', 8)
insert into tbl2
values (3, 2, 'x', 16)
-- View the output of both tables
select * from tbl1
select * from tbl2
go
create function dbo.fn_mappings(@.in int)
returns table
as
return (select id, col2 from tbl2 where fkid = (select id from tbl1 where
col3 = @.in))
go
-- View the dbo.fn_mappings() output
select * from dbo.fn_mappings(12)
-- Output requested
select t1.id
, t1.col1
, t1.col2
, t2.col2
from tbl1 t1
inner join tbl2 t2
on t1.id = t2.fkid
-- Drop all objects
drop function dbo.fn_mappings
drop table tbl1
drop table tbl2
"Ben" wrote:

> Hello,
> I have two tables that i need to join. The first table has a column which
> is an encoded addition of one or more values in a second table.
> table 1:
> col1 col2 col3
> 1 a b 12
> ...
> table 2:
> col1 col2
> 1 x 4
> 2 y 8
> 3 z 16
> ...
> the record for table 1, maps to records 1 and 2 from table 2. I know that
> the value 12 in table 1 (col3) mapps to rows 1,2 in table 2 because of thi
s
> math function that decodes the encryption.
> I have a function that is able to return a table that lists all the values
> in table 2 that correspond to the supplied value in table 1..ie if i call
> function fn_mappings(12) i get a table called @.result:
> table2value
> 1 4
> 2 8
> what i need to do is then combine these records together to get a view as
> follows
> col1 col2 table2value
> 1 a b 4
> 2 a b 8
> ...
> is this possible to do? i need this to happen for EACH row in table 1 to
> find corresponding records in table 2.
> thanks for any and all help!
> Ben|||Edgardo,
Thank you for your response...however, I do not have the liberty of changing
table2's structure. The data is provided by an external source and I am
creating custom reporting for it. Therefor i cant give it a foreign key typ
e
column.
do you have any other ideas?
Thanks again
Ben
"Edgardo Valdez, MCSD, MCDBA" wrote:
> In order to link both tables, I took the liberty of "re-create" a convenie
nt
> environment to get the results you asked. I hope it is ok.
> Let me know if it works for you
> -- Begin Script
> create table tbl1
> ( id int primary key
> , col1 varchar(10)
> , col2 varchar(10)
> , col3 int
> )
> create table tbl2
> (
> id int primary key
> , fkid int
> , col1 varchar(10)
> , col2 int
> )
> insert into tbl1
> values (1, 'a', 'b', 12)
> insert into tbl2
> values (1, 1, 'x', 4)
> insert into tbl2
> values (2, 1, 'x', 8)
> insert into tbl2
> values (3, 2, 'x', 16)
> -- View the output of both tables
> select * from tbl1
> select * from tbl2
> go
> create function dbo.fn_mappings(@.in int)
> returns table
> as
> return (select id, col2 from tbl2 where fkid = (select id from tbl1 where
> col3 = @.in))
> go
> -- View the dbo.fn_mappings() output
> select * from dbo.fn_mappings(12)
> -- Output requested
> select t1.id
> , t1.col1
> , t1.col2
> , t2.col2
> from tbl1 t1
> inner join tbl2 t2
> on t1.id = t2.fkid
> -- Drop all objects
> drop function dbo.fn_mappings
> drop table tbl1
> drop table tbl2
>
> "Ben" wrote:
>