Question

Please look at following image, I have explained my requirements in the image.

alt text http://img30.imageshack.us/img30/5668/shippment.png

I can’t use here WHERE UsageTypeid IN(1,2,3,4) because this will behave as an OR condition and fetch all records.

I just want those records, of first table, which are attached with all 4 ShipmentToID .

All others which are attached with 3 or less ShipmentToIDs are not needed in result set.

Thanks.

Answer 1

if (EntityId, UsageTypeId) is unique:

select s.PrimaryKeyField, s.ShipmentId from shipment s, item a
where s.PrimaryKeyField = a.EntityId and a.UsageTypeId in (1,2,3,4)
group by s.PrimaryKeyField, s.ShipmentId having count(*) = 4

otherwise, 4-way join for the 4 fields,

select distinct s.* from shipment s, item a,  item b, item c, item d where
s.PrimaryKeyField = a.EntityId = b.EntityId = c.EntityId = d.EntityId and
a.UsageTypeId = 1 and b.UsageTypeId = 2 and c.UsageTypeId = 3 and
d.UsageTypeId = 4

you’ll want appropriate index on (EntityId, UsageTypeId) so it doesn’t hang…