Question

I need a SP to return multiple sets of results. The second set of results would be based on a column of the first set of results.

So:

declare @myTable1 table(field0 int,field1 varchar(255))
insert into @myTable1 select top 1 field0, field1 from table1

declare @myTable2 table(field0 int,field3 varchar(255))
insert into @myTable2 
select field0, field3 from table2 
where @myTable1.field0 = @myTable2.field0

How do return @myTable1 and @myTable2 with my SP? Is this syntax even right at all?

My apologies, I’m still a newbie at SQL…

EDIT:

So, I’m getting an error on the last line of the code below that says: “Must declare the scalar variable “@myTable1″”

declare @myTable1 table(field0 int,field1 dateTime)
insert into @myTable1 
select top 1 field0, field1 
from someTable1 m
where m.field4 > 6/29/2009

select * from @myTable1
select *
from someTable2 m2
where m2.field0 = @myTable1.field0

If I highlight and run the code up until the second select * it works fine…
when I highlight the rest it acts like the first variable doesn’t exist…

EDIT2:
Figured that problem out. Thanks guys.

declare @myTable1 table(field0 int,field1 dateTime)
insert into @myTable1 
select top 1 field0, field1 
from someTable1 m
where m.field4 > 6/29/2009

select * from @myTable1
select *
from someTable2 m2
where m2.field0 = (select field0 from @myTable1)

Answer 1

You pretty much just select two result sets

SELECT * FROM @myTable1
SELECT * FROM @myTable2

However, some tools will hide some results (e.g. pgAdmin will only show the last) and some tools have some sort of requirement to get to the next result set (e.g. .NET’s IDataReader’s will not allow you to Read() from the second resultset until you call NextResult()).

Edit:

An alternative in this case, since the types of the two results match, is to combine them into a single resultset:

SELECT field0, field1 from @myTable1
UNION
SELECT field0, field3 from @myTable2

You can also choose between UNION ALL or UNION DISTINCT (the default) where the latter will only send rows that aren’t repeats.