Question

嗨，我有查询返回我的数据

SELECT
     s.StandardID,
     s.StandardName as Standard,
     TableA.Score,
     Dropdown1.Name as dq,
     Standard.ParentStandardID,         
     Standard.Weight     
FROM TableA
      JOIN Standard ON Standard.StandardID = TableA.StandardID

结果

+------------+----------+-------+------------------+---------+
| StandardID | Standard | Score | parentstandardid |  weight |
+------------+----------+-------+------------------+---------+
|    1       |     A    |       |      3           |    o    |
+------------+----------+-------+------------------+---------+
|   107      |     B    |       |     NULL         |    1    |
+------------+----------+-------+------------------+---------+
|   111      |     C    |       |      1           |   107   |
+------------+----------+-------+------------------+---------+
|   112      |     D    |       |      2           |   107   |
+------------+----------+-------+------------------+---------+

现在分数为零的地方，我想显示核心父母ID的分数总和。如果standardID为107，且得分比null为零，则应为父母ID的总和107。如果不为null或得分，则不使用分组依据。

任何帮助将不胜感激谢谢！

Answer 1

选择

S.StandardID，（当A.Score为NULL则C.Score ELSE A.Score结束的情况）AS New_Score

FROM表A

内部联接标准S ON S.StandardID = TableA.StandardID 左外连接（ SELECT S1.ParentStandardID，SUM（B.ScoreValue）得分在表B中，标准S1，其中S1.StandardID = B.StandardID GROUP BY ParentStandardID ） C 开启S.StandardID = C.ParentStandardID

如何对父ID值求和并显示为null

1 个答案: