Question

整天都在工作。

以下查询返回大约162,000条记录。其中有少数是重复项。

是的，我不确定如何解决其他问题。

此数据库从我只有READ Access权限的外部数据库中提取。

例如，如果我有两行

20684 2/26/2019 11:13:04 AM abra 123 abc 6 abra

20690 2/26/2019 11:13:04 AM abra 123 abc 6 abra

我想保留20684 abra 123 abc 6 abra

20684 is the unique I.INCIDENTID that is not included in组BY`

请协助。

   SELECT TO_CHAR(MIN(I.INCIDENTID))      AS "Incident ID",
          I.CREATIONDATE                  AS "Creation Date",
          M.MESSAGESUBJECT                AS "Email Subject",
          MO.IPADDRESS                    AS "IP Address",
          MO.DOMAINUSERNAME               AS "Login ID",
          MO.ENDPOINTMACHINENAME          AS "Computer Name"
   FROM        MESSAGE M 
   LEFT JOIN   INCIDENT I 
   ON          M.MESSAGESOURCE = I.MESSAGESOURCE 
   AND         M.MESSAGEID = I.MESSAGEID
   AND         M.MESSAGEDATE    = I.MESSAGEDATE 
   LEFT JOIN   MESSAGEORIGINATOR MO
   ON          M.MESSAGEORIGINATORID = MO.MESSAGEORIGINATORID
   LEFT JOIN   MESSAGEEXT ME
   ON          ME.MESSAGEID = M.MESSAGEID
   LEFT JOIN   INCIDENTSTATUS S
   ON          S.INCIDENTSTATUSID = I.INCIDENTSTATUSID
   LEFT JOIN   CUSTOMATTRIBUTESRECORD C
   ON          C.CUSTOMATTRIBUTESRECORDID = I.CUSTOMATTRIBUTESRECORDID                    
   GROUP BY    I.CREATIONDATE,
               M.MESSAGESUBJECT,
               MO.IPADDRESS,
               MO.DOMAINUSERNAME,
               MO.ENDPOINTMACHINENAME

Answer 1

如果CREATIONDATE是日期数据类型，则它包含最短为秒的时间元素。您所寻找的最低事件ID不太可能具有准确的时间。将日期格式化为ISO日期，GROUP BY将忽略时差。

SELECT TO_CHAR(MIN(I.INCIDENTID))      AS "Incident ID",
          to_char(I.CREATIONDATE, 'yyyy-mm-dd') AS "Creation Date",
          M.MESSAGESUBJECT                AS "Email Subject",
          MO.IPADDRESS                    AS "IP Address",
          MO.DOMAINUSERNAME               AS "Login ID",
          MO.ENDPOINTMACHINENAME          AS "Computer Name"
   FROM        MESSAGE M 
   LEFT JOIN   INCIDENT I 
   ON          M.MESSAGESOURCE = I.MESSAGESOURCE 
   AND         M.MESSAGEID = I.MESSAGEID
   AND         M.MESSAGEDATE    = I.MESSAGEDATE 
   LEFT JOIN   MESSAGEORIGINATOR MO
   ON          M.MESSAGEORIGINATORID = MO.MESSAGEORIGINATORID
   LEFT JOIN   MESSAGEEXT ME
   ON          ME.MESSAGEID = M.MESSAGEID
   LEFT JOIN   INCIDENTSTATUS S
   ON          S.INCIDENTSTATUSID = I.INCIDENTSTATUSID
   LEFT JOIN   CUSTOMATTRIBUTESRECORD C
   ON          C.CUSTOMATTRIBUTESRECORDID = I.CUSTOMATTRIBUTESRECORDID                    
   GROUP BY    to_char(I.CREATIONDATE, 'yyyy-mm-dd') 
               M.MESSAGESUBJECT,
               MO.IPADDRESS,
               MO.DOMAINUSERNAME,
               MO.ENDPOINTMACHINENAME

ORACLE SQL Group By仍会重复

1 个答案: