Question

我有一个数据库，可以根据标签确定不同的值。标签确定其是否为豁免价值的地方。例如，2 =非豁免，3 =豁免。如果我运行查询，我的结果看起来像这样

|Name  |EXEMPT VALUE|NON EXEMPT VALUE|Total Value|
|X     |100.00      |200.00          |300.00     |  
|Y     |0.00        |4.50            |4.50       |

Y的豁免值实际上是一个小于一的数字，0.30。我没有创建数据库，所以我无法控制值的数据类型。数据类型是数字，这是我的查询返回值为0.00的原因吗？我应该将数字转换为另一种数据类型以获得正确的结果。我的查询如下。

    SELECT
    NAME
    ,SUM(CASE WHEN EXEMPTIONSTATUS = 2 THEN TOTAL_VALUE ELSE 0 END) AS 'NON EXEMPT VALUE'
   ,SUM(CASE WHEN EXEMPTIONSTATUS = 3 THEN TOTAL_VALUE ELSE 0 END) AS  'EXEMPT VALUE'
   SUM(TOTAL_VALUE) AS 'TOTAL VALUE'
   FROM ORDER_ACCOUNT JOIN ACCOUNT_INVOICE
   WHERE ORDER_ACCOUNT.DATE BETWEEN 'M/D/YEAR' AND 'M/D/YEAR'
   GROUP BY NAME
   ORDER BY NAME ASC

Answer 1

尝试使用* 1.0和ELSE 0.0

并在每个VALUE

上使用SUM

SELECT
    NAME,
    SUM(CASE WHEN EXEMPTIONSTATUS = 2 THEN TOTAL_VALUE * 1.0
             ELSE 0.0 END) AS 'NON EXEMPT VALUE',
    SUM(CASE WHEN EXEMPTIONSTATUS = 3 THEN TOTAL_VALUE * 1.0
              ELSE 0.0 END) AS 'EXEMPT VALUE',
    SUM(TOTAL_VALUE) AS 'TOTAL VALUE'
FROM ORDER_ACCOUNT JOIN ACCOUNT_INVOICE
WHERE ORDER_ACCOUNT.DATE BETWEEN 'M/D/YEAR' AND 'M/D/YEAR'
GROUP BY NAME
ORDER BY NAME ASC

数据库返回0表示结果小于1

1 个答案: