一句SQL找出組件相同的bom

       

 看下圖bom結構,需求: 找出 A1 這份bom ,這個需求在工廠企業中很常見

select * from t29; 

最終實現效果

       

實現過程如下:

1.demo表結構創建

create table t29 as

with a as

(select 'A' bmb01, 'B1' bmb03

from dual

union all

select 'A' bmb01, 'B2' bmb03

from dual

union all

select 'A1' bmb01, 'B1' bmb03

from dual

union all

select 'A1' bmb01, 'B2' bmb03

from dual

union all

select 'A2' bmb01, 'B1' bmb03

from dual

union all

select 'A2' bmb01, 'C' bmb03 from dual)

select * from a

       

詳細實現過程如下:

https://articles.zsxq.com/id_2xm2mbbzjrjr.html