Question

我有下表名为TransportBooking的表，其中包含以下列中的数据：

PrintBatchNo    Count    Created            AdditionalInfo    C_Country_ID
1                10    08-nov-17 13:48:00      test1               100
1                10    08-nov-17 13:48:00      test2               100
2                25    08-nov-17 19:02:42      test3               101
2                25    08-nov-17 19:02:42      test4               101
2                25    08-nov-17 19:02:42      test5               102

我的sql是：

SELECT q1.printbatchno,
       q1.count,
       Min (q2.created),
       q2.ainfo,
       q2.countryid
FROM  (SELECT Count(tb.printbatchno) AS Count,
              tb.printbatchno
       FROM   transportbooking tb
       WHERE  tb.printbatchno IS NOT NULL
              AND tb.printbatchno > 0
       GROUP  BY tb.printbatchno)q1
      INNER JOIN (SELECT tb.printbatchno,
                         To_char(tb.created, 'dd-mon-yy  hh24:mi:ss')       AS Created,
                         tb.additional_info AS ainfo,
                         tb.c_country_id    AS countryid
                  FROM   transportbooking tb
                  WHERE  tb.printbatchno IS NOT NULL
                         AND tb.printbatchno > 0)q2
              ON q2.printbatchno = q1.printbatchno
GROUP  BY q1.printbatchno,
          q1.count,
          q2.created,
          q2.countryid,
          q2.ainfo
ORDER  BY q2.created;

上面的sql给出了以下结果：

 PrintBatchNo    Count    MIN(q2.Created)          Ainfo     CountryID
1                10    08-nov-17 13:48:00          test1        100
1                10    08-nov-17 13:48:00          test2        100
2                25    08-nov-17 19:02:42          test3        101
2                25    08-nov-17 19:02:42          test4        101
2                25    08-nov-17 19:02:42          test5        102

我希望它看起来像这样：

PrintBatchNo    Count    Created            AdditionalInfo    C_Country_ID
1                10    08-nov-17 13:48:00      test1               100
2                25    08-nov-17 19:02:42      test3               101

所以，我希望sql每个printbatchno只显示1行，并且应该显示该printbatchno的最小创建日期行。此外，它应显示AdditionalInfo和C_Country_ID列。

有人可以告诉我，我出了什么事吗？

由于

Answer 1

在标准SQL中，您将使用窗口函数：

select tb.*
from (select tb.*,
             row_number() over (partition by PrintBatchNo order by Created) as seqnum
      from transportbooking tb
     ) tb
where seqnum = 1;

GroupBy在Oracle sql的某些列上

1 个答案: