不在其上或任何其他列上使用任何聚合函数…一种方法是使用子查询，但在某些情况下，我也必须使用join，因为我认为没有获得正确的记录…感谢您的关注…@NisargPatel Oracle对其GROUP BY子句非常严格，它可能与其他RDBMs中的工作方式不同，

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不在其上或任何其他列上使用任何聚合函数…一种方法是使用子查询，但在某些情况下，我也必须使用join，因为我认为没有获得正确的记录…感谢您的关注…@NisargPatel Oracle对其

GROUP BY

子句非常严格，它可能与其他RDBMs中的工作方式不同，但我可以向你保证它确实有效。在您的情况下，您的需求是不完整的：假设您的查询返回两行具有相同的

parent\u id

，您必须告诉Oracle要检索的

id

、

due\u date

和

object\u subtype

值！通常，您将使用聚合函数。如果不想选择这些列，请从select子句中删除它们。

SELECT parent_id, id, due_date, object_subtype
  FROM amatia_logtask
 WHERE parent_id IN (SELECT id_actividad
                       FROM amatia_actividades
                      WHERE id_actividad = '12624'
                         OR id_padre = '12624')
 GROUP BY parent_id id

ORA-00933: SQL command not properly ended
00933. 00000 -  "SQL command not properly ended"
*Cause:    
*Action:
Error at Line: 9 Column: 41

group by parent_id, id
                  ^ --- missing this

 group by parent_id, id, due_date, object_subtype

SELECT DISTINCT y.parent_id, y.id, y.due_date, y.object_subtype
  FROM amatia_logtask y
 WHERE y.parent_id IN (SELECT x.id_actividad
                         FROM amatia_actividades x
                        WHERE '12624' IN (x.id_actividad, x.id_padre))

SELECT y.parent_id, y.id, 
       MAX(y.due_date) AS due_date, MIN(y.object_subtype) AS object_subtype
  FROM amatia_logtask y
 WHERE y.parent_id IN (SELECT x.id_actividad
                         FROM amatia_actividades x
                        WHERE '12624' IN (x.id_actividad, x.id_padre))
GROUP BY y.parent_id, y.id

SELECT parent_id, id, due_date, object_subtype
  FROM amatia_logtask
 WHERE parent_id IN (SELECT id_actividad
                       FROM amatia_actividades
                      WHERE id_actividad = '12624'
                         OR id_padre = '12624')
 GROUP BY parent_id, id, due_date, object_subtype

SELECT DISTINCT parent_id, id, due_date, object_subtype
  FROM amatia_logtask
 WHERE parent_id IN (SELECT id_actividad
                       FROM amatia_actividades
                      WHERE id_actividad = '12624'
                         OR id_padre = '12624')

SELECT parent_id, id, due_date, object_subtype
  FROM amatia_logtask
 WHERE parent_id IN (SELECT id_actividad
                       FROM amatia_actividades
                      WHERE id_actividad = '12624'
                         OR id_padre = '12624')
 GROUP BY parent_id,id