Queries :: Using SQL Inside IN Condition For Parameters?

I have a sql to run and I have to use many values as parameters (over 1000), which is why I am trying to use a SQL inside a IN condition.

I am testing the sql with only 1 value for now. The parameter I am using will be 2208287. This returns in a matter of seconds.

Code:
Select a.po_id, a.sku12, sum(a.unit) AS Units, sum(a.weighted) AS Weighted_Units, ((sum(a.weighted))/ (sum(a.unit))) AS weighted_turntime
From(
SELECT ds.src_evnt_txn_tmst AS alloc_ts, bc.src_evnt_txn_tmst AS ship_ts, ds.Po_id, Left(bc.sku16,12) AS SKU12, ds.distro_id AS alloc_distro, bc.distro_id AS Ship_distro, Sum(bc.unit_qty) AS Unit,

[Code] .....

but it does not work when I add a sql inside the IN condition. It actually runs forever and eventually I have to break it to stop. why this is not working with a sql inside a IN condition.

Also note:

table ROSS_REPORT_DISTRO_DTLS_SUM is a linked table
table BOL_CONTNR_SKU16_RTED is a linked table
table CopyOfdata is a local table (This is where I will put all of my values to act as parameters)

Code:

Select a.po_id, a.sku12, sum(a.unit) AS Units, sum(a.weighted) AS Weighted_Units, ((sum(a.weighted))/ (sum(a.unit))) AS weighted_turntime
From(
SELECT ds.src_evnt_txn_tmst AS alloc_ts, bc.src_evnt_txn_tmst AS ship_ts, ds.Po_id, Left(bc.sku16,12)
AS SKU12, ds.distro_id AS alloc_distro, bc.distro_id

[Code] ....