insert into temp table based on if condition

[das]

hello all,
this might be simple:

I populate a temp table based on a condition from another table:

select @condition = condition from table1 where id=1 [this will give
me either 0 or 1]

in my stored procedure I want to do this:

if @condition = 0
begin
select * into #tmp_table
from products p
inner join
sales s on p.p_data = s.p_data
end
else
begin
select * into #tmp_table
from products p
left join
sales s on p.p_data = s.p_data
end

Tha above query would not work since SQL thinks I am trying to use the
same temp table twice.

As you can see the major thing that gets effected with the condiction
being 0/1 is the join (inner or outer). The actual SQL is much bigger
with other joins but the only thing changing in the 2 sql's is the join
between products and sales tables.

any ideas gurus on how to use different sql's into temp table based on
the condition?

thanks
adi

[Chris Fulstow]

Re: insert into temp table based on if condition

This guy had the same problem:

http://www.experts-exchange.com/Databases/Microsoft_SQL_Server/Q_21594067.html

Doesn't look like they found much of a solution :(

Maybe you could try something with table variables and dynamic SQL?

[Serge Rielau]

Re: insert into temp table based on if condition

select * into #tmp_table
from products p
left join
sales s on p.p_data = s.p_data
where s.p_data IS NOT NULL OR
@condition <> 0
--
Serge Rielau
DB2 Solutions Development
IBM Toronto Lab

[Teresa Masino]

Re: insert into temp table based on if condition

You have to create your temp table outside of your select statements
and then insert into it. For example,

CREATE TABLE #tmp_table
AS SELECT *
FROM PRODUCTS
WHERE 1 = 2

IF @condition = 0
BEGIN
INSERT #tmp_table
SELECT *
FROM products ....
END
ELSE
....

Hope it helps
Teresa

das wrote:[color=blue]
> hello all,
> this might be simple:
>
> I populate a temp table based on a condition from another table:
>
> select @condition = condition from table1 where id=1 [this will give
> me either 0 or 1]
>
> in my stored procedure I want to do this:
>
> if @condition = 0
> begin
> select * into #tmp_table
> from products p
> inner join
> sales s on p.p_data = s.p_data
> end
> else
> begin
> select * into #tmp_table
> from products p
> left join
> sales s on p.p_data = s.p_data
> end
>
> Tha above query would not work since SQL thinks I am trying to use the
> same temp table twice.
>
> As you can see the major thing that gets effected with the condiction
> being 0/1 is the join (inner or outer). The actual SQL is much bigger
> with other joins but the only thing changing in the 2 sql's is the join
> between products and sales tables.
>
> any ideas gurus on how to use different sql's into temp table based on
> the condition?
>
> thanks
> adi[/color]

[Chris Fulstow]

Re: insert into temp table based on if condition

Genius.

[das]

Re: insert into temp table based on if condition

Thats a cool idea, I almost am half-bald over this problem.
but for me your solution works.

Just curious, how can we create a empty table with this statement?

CREATE TABLE #tmp_table
AS SELECT *
FROM PRODUCTS
WHERE 1 = 2

I had to use:

SLECT * INTO #tmp_table
FROM PRODUCTS
WHERE 1 = 2

and then I used the if condition.

thanks a lot again!