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所以这里我有数据库的结构:

表

情况如下,假设我有一个 ID 为 1294652442332 的子元素“Sivu”和几个属性(不重要)。我需要选择我的 Sivu 的父页面(页面是 Sivu 的父元素)。当前工作的 oracle DB 查询是

SELECT
  DISTINCT parent.oid as parentid
                , parent.otype as parenttype
                , child.oid as childid
                , child.otype as childtype
                , child.ncode as ncode
                , child.nrank as nrank
FROM
  assetrelationtree child
        , assetrelationtree parent
        , Page parentasset
WHERE
  child.oid = 1294652442332 
  AND child.otype = 'Sivu'
  AND child.nparentid != 0
  AND child.ncode = '-'
  AND parent.nid = child.nparentid
  AND parent.otype = 'Page'
  AND parentasset.id = parent.oid
  AND parentasset.status != 'VO'
ORDER BY   
  nrank

现在,在图片中您会看到有一个siteplan 表(OID 字段包含Page ID)。它还包含关于 Page(Sivu 的父元素)的另一件重要的事情。我想知道的重要领域是NCODE。因此,基本上,我想修改此查询以选择在表 siteplantree 中具有 NCODE 字段的页面元素具有特定值(NCODE = 'Placed')。我试图修改查询,但我被卡住了,我什至不知道单次选择是否可行:

SELECT
    DISTINCT parent.oid as parentid
                , parent.otype as parenttype
                , child.oid as childid
                , child.otype as childtype
                , child.ncode as ncode
                , child.nrank as nrank
FROM
    assetrelationtree child
        , assetrelationtree parent
       , Page parentasset
       , siteplantree siteplan
WHERE
    child.oid = 1294652442332
    AND child.otype = 'Sivu'
    AND child.nparentid != 0
    AND child.ncode = '-'
    AND parent.nid = child.nparentid
    AND parent.otype = 'Page'
    AND parentasset.id = parent.oid
    AND parentasset.status != 'VO'

  AND siteplan.ncode = 'Placed'
  AND siteplan.oid = child.nparentid
ORDER BY
    nrank

希望我已经描述了问题,以便您能够理解。如果有些事情不清楚,请告诉我,我会更新描述。

4

1 回答 1

2

更改AND siteplan.oid = child.nparentidAND siteplan.oid = parentasset.id

于 2013-01-28T15:34:25.193 回答