SQL组问题

我有一个查询，它显示了ORA-00979：非GROUP BY表达式错误

我不是sql专业人士，所以你能给我一个提示吗

SELECT *
  FROM (SELECT a.*, ROWNUM r___
          FROM (SELECT DISTINCT "SMTAPP"."XF_MASTER"."ID" AS "XfMasterEntityId",
                                "SMTAPP"."XP_MASTER_DETAIL"."WIFENAME" AS "XpMasterDetailEntityWifename",
                                "SMTAPP"."XP_MASTER_DETAIL"."COUNT" AS "XpMasterDetailEntityCount",
                                MAX ("SMTAPP"."XP_MASTER_DETAIL"."COUNT") AS "XpMasterDetailEntityCountMax"
                           FROM ("SMTAPP"."XF_MASTER" LEFT JOIN "SMTAPP"."XP_MASTER_DETAIL"
                                ON "SMTAPP"."XF_MASTER"."ID" =  "SMTAPP"."XP_MASTER_DETAIL"."XF_MASTER_ID")
                       GROUP BY "SMTAPP"."XP_MASTER_DETAIL"."COUNT"
                       ORDER BY "SMTAPP"."XF_MASTER"."ID" ASC) a
         WHERE ROWNUM < '11')
 WHERE r___ >= '1'

---

尝试将SELECT中的其他列添加到GROUP BY:ID和WIFENAME

尝试将SELECT中的其他列添加到GROUP BY:ID和WIFENAME

使用GROUP BY时，必须使用聚合函数聚合选择的所有列，或者将它们添加到GROUP BY子句中。否则，该列将有一个项目列表，而不是单个值

因此，请尝试使用以下方法替换现有组：

GROUP BY "SMTAPP"."XF_MASTER"."ID", 
  "SMTAPP"."XP_MASTER_DETAIL"."WIFENAME", 
  "SMTAPP"."XP_MASTER_DETAIL"."COUNT"

当您使用GROUP BY时，您选择的所有列必须使用聚合函数进行聚合，或者位于GROUP BY子句中。否则，该列将有一个项目列表，而不是单个值

因此，请尝试使用以下方法替换现有组：

GROUP BY "SMTAPP"."XF_MASTER"."ID", 
  "SMTAPP"."XP_MASTER_DETAIL"."WIFENAME", 
  "SMTAPP"."XP_MASTER_DETAIL"."COUNT"

---

在最内部的查询中

SELECT DISTINCT 
"SMTAPP"."XF_MASTER"."ID" AS "XfMasterEntityId",
"SMTAPP"."XP_MASTER_DETAIL"."WIFENAME" AS "XpMasterDetailEntityWifename",
"SMTAPP"."XP_MASTER_DETAIL"."COUNT" AS "XpMasterDetailEntityCount",
MAX ("SMTAPP"."XP_MASTER_DETAIL"."COUNT") AS "XpMasterDetailEntityCountMax"

FROM ("SMTAPP"."XF_MASTER" LEFT JOIN "SMTAPP"."XP_MASTER_DETAIL"
ON "SMTAPP"."XF_MASTER"."ID" =  "SMTAPP"."XP_MASTER_DETAIL"."XF_MASTER_ID")
GROUP BY "SMTAPP"."XP_MASTER_DETAIL"."COUNT"
ORDER BY "SMTAPP"."XF_MASTER"."ID" ASC

您在SELECT中有列，即

"SMTAPP"."XF_MASTER"."ID" AS "XfMasterEntityId",

及

SMTAPP.XP\U MASTER\U DETAIL.COUNT不属于组的一部分，这是不允许的

---

您只能在SELECT中包含属于Group By的列，或使用最内部查询中的聚合函数（如MAX/AVG etc）聚合的列

SELECT DISTINCT 
"SMTAPP"."XF_MASTER"."ID" AS "XfMasterEntityId",
"SMTAPP"."XP_MASTER_DETAIL"."WIFENAME" AS "XpMasterDetailEntityWifename",
"SMTAPP"."XP_MASTER_DETAIL"."COUNT" AS "XpMasterDetailEntityCount",
MAX ("SMTAPP"."XP_MASTER_DETAIL"."COUNT") AS "XpMasterDetailEntityCountMax"

FROM ("SMTAPP"."XF_MASTER" LEFT JOIN "SMTAPP"."XP_MASTER_DETAIL"
ON "SMTAPP"."XF_MASTER"."ID" =  "SMTAPP"."XP_MASTER_DETAIL"."XF_MASTER_ID")
GROUP BY "SMTAPP"."XP_MASTER_DETAIL"."COUNT"
ORDER BY "SMTAPP"."XF_MASTER"."ID" ASC

您在SELECT中有列，即

"SMTAPP"."XF_MASTER"."ID" AS "XfMasterEntityId",

及

SMTAPP.XP\U MASTER\U DETAIL.COUNT不属于组的一部分，这是不允许的

---

您只能在SELECT中包含属于Group By的列，或使用诸如MAX/AVG等聚合函数聚合的列。

@eumiro的意思是什么

   SELECT *
      FROM (SELECT a.*, ROWNUM r___
              FROM (SELECT DISTINCT "SMTAPP"."XF_MASTER"."ID" AS "XfMasterEntityId",
                                    "SMTAPP"."XP_MASTER_DETAIL"."WIFENAME" AS "XpMasterDetailEntityWifename",
                                    "SMTAPP"."XP_MASTER_DETAIL"."COUNT" AS "XpMasterDetailEntityCount",
                                    MAX ("SMTAPP"."XP_MASTER_DETAIL"."COUNT") AS "XpMasterDetailEntityCountMax"
                               FROM ("SMTAPP"."XF_MASTER" LEFT JOIN "SMTAPP"."XP_MASTER_DETAIL"
                                    ON "SMTAPP"."XF_MASTER"."ID" =  "SMTAPP"."XP_MASTER_DETAIL"."XF_MASTER_ID")
                           GROUP BY "SMTAPP"."XF_MASTER"."ID", "SMTAPP"."XP_MASTER_DETAIL"."WIFENAME", "SMTAPP"."XP_MASTER_DETAIL"."COUNT"
                           ORDER BY "SMTAPP"."XF_MASTER"."ID" ASC) a
             WHERE ROWNUM < '11')
     WHERE r___ >= '1'

---

@eumiro的意思是

   SELECT *
      FROM (SELECT a.*, ROWNUM r___
              FROM (SELECT DISTINCT "SMTAPP"."XF_MASTER"."ID" AS "XfMasterEntityId",
                                    "SMTAPP"."XP_MASTER_DETAIL"."WIFENAME" AS "XpMasterDetailEntityWifename",
                                    "SMTAPP"."XP_MASTER_DETAIL"."COUNT" AS "XpMasterDetailEntityCount",
                                    MAX ("SMTAPP"."XP_MASTER_DETAIL"."COUNT") AS "XpMasterDetailEntityCountMax"
                               FROM ("SMTAPP"."XF_MASTER" LEFT JOIN "SMTAPP"."XP_MASTER_DETAIL"
                                    ON "SMTAPP"."XF_MASTER"."ID" =  "SMTAPP"."XP_MASTER_DETAIL"."XF_MASTER_ID")
                           GROUP BY "SMTAPP"."XF_MASTER"."ID", "SMTAPP"."XP_MASTER_DETAIL"."WIFENAME", "SMTAPP"."XP_MASTER_DETAIL"."COUNT"
                           ORDER BY "SMTAPP"."XF_MASTER"."ID" ASC) a
             WHERE ROWNUM < '11')
     WHERE r___ >= '1'