Question

这是一个示例数据：如果stringvalue包含或等于ID，则使用stringvalue检查此表ID，它根据满足的条件获取代码。如果存在至少1个满足条件，则查询将连接代码的任何值并将其置于新代码下。

   Scenario 1
    ID            CODE     VALUE               Newcode
    4           42                              44,45
    4           43                              44,45
    4           44         2,4,6                44,45
    4           45         2,4,6                44,45

Scenario 2

ID        CODE         VALUE                Newcode
4           42                     44
4           43                     44
4           44         4           44
4           45         3           44

Answer 1

只需使用list_agg：

select sub.mainid, list_agg(cast(sub_code as nvarchar(100)), ',')
from ENPTREEATTRS SUB 
WHERE SUB.CODE in ('42','43','44','45') and
      SUB.STRINGVALUE LIKE '%'||cast(id as nvarchar(100))||'%'
group by sub.mainid

顺便说一下，你不应该在SQL Server中使用convert(nvarchar, id)。您应该始终提供长度，例如convert(nvarchar(100), id)。

Answer 2

根据您的更新，您应该能够使用子查询来获取列表数据，然后将其加入到您的表中：

SELECT DISTINCT
  ID,
  CODE,
  ATTRSTRINGVALUE,
  SUB.Newcode
FROM Table1 A
INNER JOIN tabel2 b 
  ON a.MainID = b.mainID
LEFT JOIN
(
  SELECT SUB.MainID, 
    list_agg(cast(SUB.CODE as nvarchar2(50)), ',') as Newcode
  FROM ENPTREEATTRS SUB 
  WHERE SUB.CODE in ('42','43','44','45')
    AND SUB.STRINGVALUE LIKE '%'||cast(ID as nvarchar2(50))||'%'
  GROUP BY SUB.MainID
) SUB
  ON SUB.MainID = A.MainID

在您发布的新查询后，编辑＃1可以使用：

SELECT DISTINCT
  ID,
  CODE,
  ATTRSTRINGVALUE,
  SUB.Newcode
FROM ENPBATREE A
LEFT OUTER JOIN enptreeattrs B on A.MainID = B.MainID 
LEFT OUTER JOIN ENPTREEATTRS B1 on B.MainID = B1.MainID 
LEFT OUTER JOIN ENPTREEATTRS B2 on B1.MainID = B2.MainID 
LEFT OUTER JOIN ENPENTRYACCESSUSERSROLES D on B2.MainID = D.MainID 
LEFT OUTER JOIN ENPENTRYACCESSLIST F on D.USERNAME = F.USERNAME
LEFT JOIN
(
  SELECT SUB.MainID, 
    list_agg(cast(SUB.CODE as nvarchar2(50)), ',') as Newcode
  FROM ENPTREEATTRS SUB 
  WHERE SUB.CODE in ('42','43','44','45')
    AND SUB.STRINGVALUE LIKE '%'||cast(ID as nvarchar2(50))||'%'
  GROUP BY SUB.MainID
) SUB
  ON SUB.MainID = A.MainID

您可以在没有子查询的情况下执行此操作：

SELECT
  A.TREEENTRYID,
  F.accessid,
  b1.ATTRID,
  b1.attrstringvalue,
  list_agg(cast(SUB.ATTRID as nvarchar2(50)), ',') as Newcode
FROM ENPBATREE A
LEFT OUTER JOIN enptreeattrs B on A.TREEENTRYID  = B.TREEENTRYID 
LEFT OUTER JOIN ENPTREEATTRS B1 on B.TREEENTRYID = B1.TREEENTRYID
LEFT OUTER JOIN ENPTREEATTRS B2 on B1.TREEENTRYID = B2.TREEENTRYID
LEFT OUTER JOIN ENPENTRYACCESSUSERSROLES D on B2.TREEENTRYID = D.TREEENTRYID
LEFT OUTER JOIN ENPENTRYACCESSLIST F on D.USERNAME = F.USERNAME
LEFT JOIN enptreeattrs SUB 
  ON SUB.MainID = A.MainID
WHERE SUB.ATTRID in ('42','43','44','45')
  AND SUB.ATTRSTRINGVALUE LIKE '%'||cast(F.ACCESSID as nvarchar2(50))||'%'
GROUP BY A.TREEENTRYID, F.ACCESSID, 
  b1.ATTRID, b1.attrstringvalue;

SELECT ID, CODE, ATTRSTRINGVALUE, list_agg(cast(SUB.CODE as nvarchar2(50)), ',') as Newcode FROM ENPBATREE A LEFT OUTER JOIN enptreeattrs B on A.MainID = B.MainID LEFT OUTER JOIN ENPTREEATTRS B1 on B.MainID = B1.MainID LEFT OUTER JOIN ENPTREEATTRS B2 on B1.MainID = B2.MainID LEFT OUTER JOIN ENPENTRYACCESSUSERSROLES D on B2.MainID = D.MainID LEFT OUTER JOIN ENPENTRYACCESSLIST F on D.USERNAME = F.USERNAME LEFT JOIN ENPTREEATTRS SUB ON SUB.MainID = A.MainID WHERE SUB.CODE in ('42','43','44','45') AND SUB.STRINGVALUE LIKE '%'||cast(ID as nvarchar2(50))||'%' GROUP BY ID, CODE, ATTRSTRINGVALUE

<击>

STUFF和Oracle11g查询中的XML路径

2 个答案: