Question

我的SQL查询如下：

SELECT 
  oh.ORDER_NUMBER, oh.CREATED_TS, stat.STATE, stat.TIMESTAMP 
FROM 
 IMPL_OH_ORDER_HEADER oh,
 SNCR_ORDER_DISPOSITION stat,
 SNCR_ORDER_DISP_HEAD stathead,
 IMPL_CUST_ACCOUNT cust 
WHERE 
 stat.DISP_TRANSACTION_ID=stathead.DISP_TRANSACTION_ID
 and stathead.TRANSACTION_ID=oh.TRANSACTION_ID 
 and oh.ACCOUNT_ID=cust.ACCOUNT_ID 
 and stat.CATEGORY=100 
 and oh.USER_ID='a' 
 and cust.ACCOUNT_NUM='123'
 GROUP BY oh.ORDER_NUMBER
 ORDER BY stat.TRX_SEQ DESC;

出现以下错误：ORA-00979: not a GROUP BY expression

如果我删除GROUP BY表达式，我就不会收到错误。

什么是正确的GROUP BY语法？

研究：谷歌搜索说，如果使用AGGREGATE函数，我应该在GROUP BY子句中使用聚合函数不使用的所有字段。所以我尝试将GROUP BY表达式修改为GROUP BY oh.ORDER_NUMBER, oh.CREATED_TS, stat.TIMESTAMP, stat.STATE。

然而我得到同样的错误。

请帮忙。

Answer 1

您收到错误是因为列表中的订单中有STAT.TRX_SEQ。

如果 group by 子句与 order by 子句一起使用，则必须按照您分组的列或聚合值进行排序。

此规则也适用于选定的值：它们是group by或aggregate函数（或伪列）的一部分。

Answer 2

你能试试这个吗？看看??

SELECT   OH.ORDER_NUMBER,
         OH.CREATED_TS,
         STAT.STATE,
         STAT.TIMESTAMP
FROM     IMPL_OH_ORDER_HEADER OH,
         SNCR_ORDER_DISPOSITION STAT,
         SNCR_ORDER_DISP_HEAD STATHEAD,
         IMPL_CUST_ACCOUNT CUST
WHERE    STAT.DISP_TRANSACTION_ID = STATHEAD.DISP_TRANSACTION_ID
AND      STATHEAD.TRANSACTION_ID = OH.TRANSACTION_ID
AND      OH.ACCOUNT_ID = CUST.ACCOUNT_ID
AND      STAT.CATEGORY = 100
AND      OH.USER_ID = 'A'
AND      CUST.ACCOUNT_NUM = '123'
GROUP BY OH.ORDER_NUMBER,
         OH.CREATED_TS,
         STAT.STATE,
         STAT.TIMESTAMP
ORDER BY STAT.TRX_SEQ DESC;

ORACLE GROUP BY错误

2 个答案: