Connect By Prior 与之前的值

Question

对不起，我试图找到答案，但没有找到。我会在我的查询中有太前的 (!) ARNT as parentARTNR 和 POSNR as parentPOSNR。我试过 CONNECT_BY_ROOT，但这只是 TOP ARTNR 和 POSNR。比我试过SYS_CONNECT_BY_PATH(t1.ARTNR, '/') as parentARTNR，但是那个returns全树。

你知道我该怎么做吗？

这个 SQL 工作正常，但它没有父值。

SELECT 
    level,
    t1.ARTNR, 
    t1.POSNR
FROM 
    SMSTLPOS t1
START WITH 
    t1.ARTNR = '057516'
CONNECT BY t1.ARTNR = PRIOR t1.KOMPARTNR

我想要的是：

SELECT 
 level,
 t1.ARTNR, 
 t1.POSNR,
 t0.ARTNR as parentARTNR,
 t0.POSNR as parentPOSNR
FROM 
 SMSTLPOS t1
START WITH 
 t1.ARTNR = '057516'
CONNECT BY t1.ARTNR = PRIOR t1.KOMPARTNR

或者例如用更新声明变量值...我不知道。

这与我想在 sql 服务器中为 Oracle 执行的操作相同：

with
  n(KOMPARTNR, ARTIKEL_NR, level, parentARTNR, parentPOSNR) as (
    select SMSTLPOS.KOMPARTNR,
           SMSTLPOS.ARTNR,
           1 as level,
           SMSTLPOS.ARTNR as parentARTNR,
           SMSTLPOS.POSNR as parentPOSNR
      from SMSTLPOS
     WHERE SMSTLPOS.ARTNR='51269'  -- ARTNR isn't constant  

   UNION ALL

    SELECT SMSTLPOS1.KOMPARTNR,
           SMSTLPOS1.ARTNR,
           n.level + 1,
           n.parentARTNR,
           n.parentPOSNR
      from SMSTLPOS as SMSTLPOS1, n
     WHERE n.KOMPARTNR = SMSTLPOS1.ARTNR
)
SELECT * from n

Answer 1

天哪，我做到了！ :D 全部在 SYS_CONNECT_BY_PATH 中，但格式为 /10/20/30/40，我想要（从这个例子）30。首先我使用 substr 并获得 /10/20/30，然后我发现'/' 的位置并在前一个 substr 上再次使用 substr。这很好还是你有更好的主意？

SELECT 
 level,
 SMSTLPOS.ARTNR, 
 SMSTLPOS.POSNR,
 SUBSTR((SUBSTR(SYS_CONNECT_BY_PATH(SMSTLPOS.POSNR, '/'),0, (INSTR(SYS_CONNECT_BY_PATH(SMSTLPOS.POSNR, '/'), '/',-1)-1))), (INSTR(SUBSTR(SYS_CONNECT_BY_PATH(SMSTLPOS.POSNR, '/'),0, (INSTR(SYS_CONNECT_BY_PATH(SMSTLPOS.POSNR, '/'), '/',-1)-1)), '/', -1))+1) as parentPOSNR,
 SUBSTR((SUBSTR(SYS_CONNECT_BY_PATH(SMSTLPOS.ARTNR, '/'),0, (INSTR(SYS_CONNECT_BY_PATH(SMSTLPOS.ARTNR, '/'), '/',-1)-1))), (INSTR(SUBSTR(SYS_CONNECT_BY_PATH(SMSTLPOS.ARTNR, '/'),0, (INSTR(SYS_CONNECT_BY_PATH(SMSTLPOS.ARTNR, '/'), '/',-1)-1)), '/', -1))+1) as parentARTNR
FROM 
 SMSTLPOS
START WITH 
 SMSTLPOS.ARTNR = '057516'
CONNECT BY SMSTLPOS.ARTNR = PRIOR SMSTLPOS.KOMPARTNR

Connect By Prior 与之前的值

Connect By Prior with previous values

sql

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connect-by