BOM Query

Question

Need help in writing a query to fetch all the assembled items. I have requirement as part of which I will pass Item1, Item2, Item3.... need to get all the assembled items which are using all this items (not just one all the items).
Below query is fetching assembly items which are using any one items.
Select * from bom_bill_of_materials bom, bom_inventory_components bic, mtl_system_items_b msib
where bic.component_item_id = msib2.inventory_item_id
AND bom.bill_sequence_id = bic.bill_sequence_id
AND msib.segment1 IN ('Item1','Item2','Item3')
How can modify it to fetch only assembly items which are using all the 3 items.
As the above query 'IN' is acts like OR (condition1 or condition2....)
Thanks for your response

Answer 1

Hi,
User910243567 wrote:
Need help in writing a query to fetch all the assembled items. I have requirement as part of which I will pass Item1, Item2, Item3.... need to get all the assembled items which are using all this items (not just one all the items).That depends on your data.
Whenever you have a problem, please post a little sample data (CREATE TABLE and INSERT statements, relevant columns only) from all tables.
Also post the results you want from that data, and an explanation of how you get those results from that data, with specific examples.
Always say which version of Oracle you're using.
Below query is fetching assembly items which are using any one items.Is it really doing that?
Usually, "bill of materials" means a recursive, multi-level parent-child relationship. For example, a wagon may consist of a body, a handle, and 2 axle assembiles. An axle assembly may consist of an axle and 2 wheel assemblies, and a wheel assembly may consist of a wheel, a bracket, and 4 XYZ screws. If you're interested in which products require XYZ screws, would that mean just a wheel assembly, or would it include axle assembly and wagon as well as wheel assembly? The query you posted seems to only look at parents and their children; there's nothing recursive or multi-level about it.
Select * from bom_bill_of_materials bom, bom_inventory_components bic, mtl_system_items_b msib
where bic.component_item_id = msib2.inventory_item_id
AND bom.bill_sequence_id = bic.bill_sequence_id
AND msib.segment1 IN ('Item1','Item2','Item3')
How can modify it to fetch only assembly items which are using all the 3 items.
As the above query 'IN' is acts like OR (condition1 or condition2....)
Thanks for your responseIf the query above really is finding all the objects that use any 1 of the 3 components, then the following will return objects that are using all 3 of them:
WITH     got_cnt
     SELECT  ...     -- list distinct columns needed for output
     ,     COUNT (DISTINCT msib.segment1) OVER (PARTITION BY  x)     AS cnt
     FROM      bom_bill_of_materials          bom
     ,      bom_inventory_components      bic
     ,      mtl_system_items_b          msib
     WHERE     bic.component_item_id     = msib2.inventory_item_id
     AND     bom.bill_sequence_id     = bic.bill_sequence_id
     AND     msib.segment1           IN ('Item1', 'Item2', 'Item3')
SELECT     *     -- or list all columns except cnt
FROM     got_cnt
WHERE     cnt     = 3
;where x uniquely identifies the object that must include all 3. (X can be a single column, or some other expression, or a list of several columns and/or other expressions.)
If one of the target items is "XYZ screw", then neither query above would include wagon or axle assembly. To get those results, you could do a CONNECT BY query, using CONNECT_BY_ROOT. In this case, it's especially important to say which version of Oracle you have, because every version since Oracle 7 has had singnificant improvements in this area.