公用表表达示展BOM示例

公用表表达示展BOM示例，并计算累计用量。

示例数据库为SQL示例数据库AdventureWorks，表名 Production.BillOfMaterials，Production.Product

;with bom as
(
select b.ProductAssemblyID,b.ComponentID,b.BOMLevel,b.PerAssemblyQty,cast(b.PerAssemblyQty as decimal(10,6)) qty,ROW_NUMBER() over(order by getdate()) od
from Production.BillOfMaterials b where b.ComponentID=767
union all
select b.ProductAssemblyID,b.ComponentID,b.BOMLevel,b.PerAssemblyQty,cast(b.PerAssemblyQty*bom.qty as decimal(10,6)) ,ROW_NUMBER() over(order by getdate())+ bom.od*100
from Production.BillOfMaterials b join bom on b.ProductAssemblyID=bom.ComponentID
)
select p.ProductNumber '物料编码',replicate('..',bom.bomlevel)+ p.Name '物料名称' ,bom.BOMLevel '层级',bom.PerAssemblyQty 'BOM用量',
bom.qty '累计用量',bom.od '排序' from bom join Production.Product p on bom.ComponentID=p.ProductID
order by rtrim(od)