SQL 错误 [937] [42000]: ORA-00937: not a single-group group function答案

【问题标题】：SQL Error [937] [42000]: ORA-00937: not a single-group group functionSQL 错误 [937] [42000]: ORA-00937: not a single-group group function
【发布时间】：2021-09-08 11:25:01
【问题描述】：

我使用 oracle 使用 CTE 计算一些别名，但是当我运行它时发生错误

这是我的查询：

WITH BOXCOUNT AS (                                                         
SELECT 
PRODUCT_CODE 

 , ROUND(SUM(TOTAL_QUANTITY/PACKING_STYLE)) AS FULLBOX
 
 , CASE WHEN SUM((TOTAL_QUANTITY - ROUND(SUM(TOTAL_QUANTITY/PACKING_STYLE))) * PACKING_STYLE) = 0 THEN 0
       WHEN SUM((TOTAL_QUANTITY - ROUND(SUM(TOTAL_QUANTITY/PACKING_STYLE))) * PACKING_STYLE) > 0 THEN 1
    END AS SPAREBOX

FROM 
LOG0104M 

GROUP BY 
    PRODUCT_CODE)

SELECT
L04.PRODUCT_CODE
, L04.PRODUCT_NAME 
, L04.TOTAL_QUANTITY
, L04.PACKING_STYLE

, BC.FULLBOX
, BC.SPAREBOX

, SUM(BC.FULLBOX + BC.SPAREBOX) AS TOTALBOX

    
FROM LOG0104M L04
JOIN BOXCOUNT BC
ON   BC.PRODUCT_CODE = L04.PRODUCT_CODE 

GROUP BY  
L04.PRODUCT_CODE
, L04.PRODUCT_NAME
, L04.TOTAL_QUANTITY
, L04.PACKING_STYLE

, BC.FULLBOX
, BC.SPAREBOX

这是一个错误：

SQL Error [937] [42000]: ORA-00937: not a single-group group function

我该如何解决这个错误

【问题讨论】：

标签： sql oracle oracle11g

【解决方案1】：

请在 CTE 中更改以下代码行

CASE WHEN SUM((TOTAL_QUANTITY - ROUND(SUM(TOTAL_QUANTITY/PACKING_STYLE))) * PACKING_STYLE) = 0 THEN 0
       WHEN SUM((TOTAL_QUANTITY - ROUND(SUM(TOTAL_QUANTITY/PACKING_STYLE))) * PACKING_STYLE) > 0 THEN 1
    END AS SPAREBOX

按功能分组应应用于 CASE 表达式，即

sum(CASE WHEN ((TOTAL_QUANTITY - ROUND((TOTAL_QUANTITY/PACKING_STYLE))) * PACKING_STYLE) = 0 THEN 0
       WHEN ((TOTAL_QUANTITY - ROUND((TOTAL_QUANTITY/PACKING_STYLE))) * PACKING_STYLE) > 0 THEN 1
    END) AS SPAREBOX

【讨论】：