Question

所以我有下表例如

|Company Name | Weight | Date |Unique ID|
|:------------|:-------|:-----|:--------|
|ABC          |22      |10-3  |1        |
|ABC          |22      |10-3  |2        |
|DEF          |50      |10-3  |3        |
|DEF          |50      |10-3  |4        |

只有当该组的SUM（WEIGHT）为＆gt; = 100时，才需要SELECT语句才能显示组。

所以输出应该是：

|Company Name | Weight | Date |Unique ID|
|:------------|:-------|:-----|:--------|
|ABC          |22      |10-3  |1        |
|ABC          |22      |10-3  |2        |
|DEF          |100     |10-3  |GROUP    |

目前，我正在尝试以下方法，但收到无效的群组使用

SELECT COMPANY_NAME, DATE,
 (CASE WHEN SUM(WEIGHT) >= 100 THEN 'GROUP' ELSE UNIQUE_ID END) AS
  GROUP_CRITERIA 
  FROM TABLE GROUP BY COMPANY_NAME, DATE, 
  (CASE WHEN SUM(WEIGHT) >= 100 THEN 'GROUP' ELSE UNIQUE_ID END);

Answer 1

看来你的意思是你想要的总和（权重）＆lt; 100应该包含在一个组中。

为此，我在派生表子查询中执行第一个GROUP BY，然后我可以在外部查询的表达式中引用该总和：

SELECT 
  CASE WHEN TOTAL_WEIGHT >= 100 THEN COMPANY_NAME ELSE 'GROUP' END AS COMPANY_NAME,
  DATE,
  SUM(TOTAL_WEIGHT) AS TOTAL_WEIGHT
FROM (
  SELECT COMPANY_NAME, DATE, SUM(WEIGHT) AS TOTAL_WEIGHT
  FROM MyTable
  GROUP BY COMPANY_NAME, DATE
) AS T
GROUP BY COMPANY_NAME, DATE;

Answer 2

我在想这样的事情：

SELECT DISTINCT T1.company_name, IFNULL(T2.weight, T1.weight) AS weight, IFNULL(T2.date, T1.date) AS "date", IF(T2.company_name IS NULL, T1.unique_id, T2.unique_id)
FROM table T1
LEFT OUTER JOIN (
    SELECT company_name, `date`, SUM(weight) AS weight
    FROM table
    GROUP BY company_name
    HAVING SUM(weight) >= 100) T2 ON T2.company_name = T1.company_name

Answer 3

这是一种方式：（最大（日期），因为你没有提到你是如何为小组做的）

SELECT COMPANY_NAME, DATE, WEIGHT, UNIQUE_ID
FROM TABLE
WHERE COMPANY_NAME in 
  ( SELECT COMPANY_NAME FROM 
    (SELECT COMPANY_NAME, SUM(WEIGHT) FROM TABLE GROUP BY COMPANY_NAME
      HAVING SUM(WEIGHT) < 100) u)

UNION

SELECT COMPANY_NAME, MAX(DATE), SUM(WEIGHT), 'GROUP'
FROM TABLE
WHERE COMPANY_NAME not in 
  ( SELECT COMPANY_NAME FROM (SELECT COMPANY_NAME, SUM(WEIGHT) FROM TABLE GROUP BY COMPANY_NAME
    HAVING SUM(WEIGHT) < 100) u)

GROUP BY COMPANY_NAME

如果符合条件，则为组列，否则为“不组”

3 个答案: