Oracle SQL: как вернуть несколько отдельных столбцов

Question

У меня есть Oracle Query, который выводит

но я хочу вывести все отдельные столбцы, кроме идентификатора инцидента, т.е.

Я пытался добавить GROUP BY в Oracle Query, но получил ошибку,

DataSource.Error: Oracle: ORA-00979: not a GROUP BY expression
Details:
    DataSourceKind=Oracle
    DataSourcePath=dlporacle
    Message=ORA-00979: not a GROUP BY expression
    ErrorCode=-2147467259

Ниже мой запрос ... пожалуйста, помогите

SELECT 
   I.INCIDENTID                    AS "Incident ID",
   I.CREATIONDATE                  AS "Creation Date",
   MO.IPADDRESS           AS "IP Address",
   MO.DOMAINUSERNAME               AS "Login ID",
   MO.ENDPOINTMACHINENAME          AS "Computer Name",
   M.MESSAGESUBJECT                AS "Email Subject"
 FROM MESSAGE M,
 JOIN INCIDENT I ON M.MESSAGEID = I.MESSAGEID AND M.MESSAGESOURCE = I.MESSAGESOURCE AND  M.MESSAGEDATE  = I.MESSAGEDATE
 JOIN MESSAGEORIGINATOR MO ON  M.MESSAGEORIGINATORID = MO.MESSAGEORIGINATORID
 WHERE  M.MESSAGESOURCE = 'ENDPOINT'
    AND I.ISDELETED = 0
  GROUP BY MO.IPADDRESS, MO.DOMAINUSERNAME, MO.ENDPOINTMACHINENAME, M.MESSAGESUBJECT

Answer 1

Исправьте синтаксис JOIN и используйте агрегирование:

SELECT
   MIN(I.INCIDENTID)      AS "Incident ID",
   I.CREATIONDATE                  AS "Creation Date",
   MO.IPADDRESS           AS "IP Address",
   MO.DOMAINUSERNAME               AS "Login ID",
   MO.ENDPOINTMACHINENAME          AS "Computer Name",
   M.MESSAGESUBJECT                AS "Email Subject"
FROM MESSAGE M JOIN
     INCIDENT I
     ON M.MESSAGEID = I.MESSAGEID AND
        M.MESSAGESOURCE = I.MESSAGESOURCE AND
        M.MESSAGEDATE = I.MESSAGEDATE JOIN
     MESSAGEORIGINATOR MO
     ON  M.MESSAGEORIGINATORID = MO.MESSAGEORIGINATORID
WHERE M.MESSAGESOURCE = 'ENDPOINT' AND I.ISDELETED = 0
GROUP BY I.CREATIONDATE, MO.IPADDRESS, MO.DOMAINUSERNAME, MO.ENDPOINTMACHINENAME, M.MESSAGESUBJECT

Все неагрегированные столбцы должны находиться в GROUP BY.

Почему источники дата должна совпадать для присоединения к INCIDENT, а также идентификатор сообщения?Казалось бы, идентификатора сообщения должно быть достаточно.

Answer 2

Попробуйте это

 SELECT MIN(I.INCIDENTID)               AS "Incident ID",
        I.CREATIONDATE                  AS "Creation Date",
        MO.IPADDRESS                    AS "IP Address",
        MO.DOMAINUSERNAME               AS "Login ID",
        MO.ENDPOINTMACHINENAME          AS "Computer Name",
        M.MESSAGESUBJECT                AS "Email Subject"
   FROM MESSAGE M,
        INCIDENT I,
        MESSAGEORIGINATOR MO
  WHERE M.MESSAGESOURCE = 'ENDPOINT'
    AND M.MESSAGESOURCE = I.MESSAGESOURCE
    AND M.MESSAGEID = I.MESSAGEID
    AND M.MESSAGEDATE = I.MESSAGEDATE 
    AND M.MESSAGEORIGINATORID = MO.MESSAGEORIGINATORID 
    AND I.ISDELETED = 0
  GROUP BY I.CREATIONDATE, MO.IPADDRESS, MO.DOMAINUSERNAME, MO.ENDPOINTMACHINENAME,M.MESSAGESUBJECT