SQL - MAX値が適切な値に適合しない

Question

最後の請求書データに基づいてすべてのユーザーのデータを抽出する必要があります。ここではデータがあります：

CREATE TABLE bite 
    (`ACCOUNT` int, `ISSUEDATE` datetime, `REFERENCE` int, 
    `ID` int, `AMOUNT` decimal(10,2)) 
; 

INSERT INTO bite 
    (`ACCOUNT`, `ISSUEDATE`, `REFERENCE`, `ID`, `AMOUNT`) 
VALUES 
    (2947471, '2012-12-31 00:00:00', 0005632765, 11543487, 40.18), 
    (2947471, '2016-12-30 00:00:00', 0017945914, 36672073, 34.75), 
    (2947471, '2012-11-30 00:00:00', 0005448824, 11001690, 33.69), 
    (2947471, '2013-03-31 00:00:00', 0006316596, 12759258, 33.44), 
    (2956987, '2015-07-01 00:00:00', 0012754607, 26035486, 26.79), 
    (2956987, '2015-12-30 00:00:00', 0014371958, 29254616, 25.14), 
    (2947471, '2014-05-31 00:00:00', 0009478470, 19223669, 23.34), 
    (2947471, '2013-03-02 00:00:00', 0006177725, 12352924, 21.17), 
    (2956987, '2014-05-31 00:00:00', 0009504785, 19223632, 20.24), 
    (2947471, '2014-01-31 00:00:00', 0008753563, 17845265, 19.97), 
    (2947471, '2013-06-30 00:00:00', 0007174573, 14523560, 19.28), 
    (2947471, '2014-06-30 00:00:00', 0010048671, 20171164, 19.22), 
    (2947471, '2015-01-31 00:00:00', 0011793537, 23926223, 18.98), 
    (2947471, '2014-03-31 00:00:00', 0009215609, 18762696, 18.26), 
    (2947471, '2013-11-30 00:00:00', 0008394094, 16600223, 18.14), 
    (2947471, '2013-04-30 00:00:00', 0006818798, 13568161, 18.08), 
    (2956987, '2015-06-30 00:00:00', 0013061086, 26579781, 18.03), 
    (2956987, '2014-10-31 00:00:00', 0010942060, 22376155, 18), 
    (2947471, '2013-12-31 00:00:00', 0008440468, 17395187, 18), 
    (2947471, '2013-10-31 00:00:00', 0007958174, 16156026, 17.94), 
    (2947471, '2013-08-31 00:00:00', 0007585482, 15274737, 17.79), 
    (2947471, '2012-11-30 00:00:00', 0005632765, 11543487, 40.18), 
    (2947471, '2016-11-30 00:00:00', 0017945914, 36672073, 34.75), 
    (2947471, '2012-10-31 00:00:00', 0005448824, 11001690, 33.69), 
    (2947471, '2013-02-28 00:00:00', 0006316596, 12759258, 33.44), 
    (2956987, '2015-05-31 00:00:00', 0012754607, 26035486, 26.79), 
    (2956987, '2015-11-30 00:00:00', 0014371958, 29254616, 25.14) 
; 

そして、これはクエリです：

select account, max(issuedate) as "LAST INVOICE DATE", 
    reference,amount,round(avg(amount),2) as "AVERAGE AMOUNT" 
from bite 
group by account 

（ここではフィドルからも入手可能：http://sqlfiddle.com/#!9/5280b7/58/0）

は、あなたが、私はすべてがすべてに関係していることがわかりますので、最大の日付ではなく、逆の場合もあります。最大の日付値に関連する列のすべてのレコードが必要です。私が間違っていることを教えてください。あなたがmax issuedateを取得subqueryを使用する必要があります最後issuedateからのデータだけを取得するために

Answer 1

：

select account, 
     max(issuedate) as "LAST INVOICE DATE", 
     amount, 
     (select round(avg(b3.amount),2) 
      from bite b3 
     where b3.account = b.account) as "AVERAGE AMOUNT" 
    from bite b 
where b.issuedate = (select max(b2.issuedate) 
         from bite b2 
         where b2.account = b.account) 
group by account, issuedate 

Answer 2

私はコードがあなたを助けることができることを願っています。

with withbite 
as(
select row_number()over(partition by account order by issuedate desc) as line, 
     account, 
     issuedate, 
     reference, 
     amount 
from bite 
) 
select account, 
     issuedate as 'LAST INVOICE DATE', 
     reference, 
     amount, 
     round(avg(amount),2) as 'AVERAGE AMOUNT' 
from withbite 
where line=1 
group by account, 
     issuedate, 
     reference, 
     amount