Question

我在SQL Server中的查询有问题。

我在ORACLE SQL中有此查询。

select 
    LEVEL, serial_number, table_, position, description, article, next_table, root_table 
from
    bill_of_material 
where 
    serial_number = ABC.123.ZXC  
start with table_ = root_table
connect by prior next_table=table_
order by level, table_, position

我需要在SQL Server中获得相同的查询。

此查询适用于级别，数据记录很多，我需要一棵具有不同级别的树。

请大家帮我吗？

最好的问候

亚历山德罗

Answer 1

您需要将其转换为递归公用表表达式：

with rcte(level, serial_number, table_, position, description, article, next_table, root_table)
as (
  select 1, serial_number, table_, position, description, article, next_table, root_table
    from bill_of_material
   where serial_number = ABC.123.ZXC
     -- Start with
     and table_ = root_table
  union all
  select prev.level+1
       , curr.serial_number
       , curr.table_
       , curr.position
       , curr.description
       , curr.article
       , curr.next_table
       , curr.root_table
    from rcte prev
    join bill_of_material curr
      on prev.next_table = curr.table_
)
select * from rcte
 order by level, table_, position

在SQL Server中级别并从

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