你想在這里做兩件事 . 我假設您正在使用Oracle(因為您正在使用Java) .

首先，您希望對每個用戶的每日交易進行分組 .

創建一個名為 tempTable 的臨時表 .

使用 to_char(currentdate, 'yyyy/mm/dd') 對它們進行分組 .

INSERT INTO tempTable

SELECT

userid,

resourceid,

doc_name,

trans_id,

to_char(currentdate, 'yyyy/mm/dd') as currentday,

to_char(currentdate, 'MM') as month_value,

count(*) as daily_count

FROM

usertransaction

GROUP BY

userid,

resourceid,

doc_name,

trans_id,

to_char(currentdate, 'yyyy/mm/dd')

如果你有太多的數據行，我建議你這樣做;每天做一次 .

INSERT INTO tempTable

SELECT

userid,

resourceid,

doc_name,

to_char(currentdate, 'yyyy/mm/dd') as currentday,

to_char(currentdate, 'MM') as month_value,

count(*) as daily_count

FROM

usertransaction

WHERE

to_char(currentdate, 'yyyy/mm/dd') = to_char(SYSDATE, 'yyyy/mm/dd')

GROUP BY

userid,

resourceid,

doc_name,

trans_id

其次，您需要根據 month_value 進行多次插入 .

INSERT INTO txn_jan

SELECT

userid,

resourceid,

doc_name,

to_date(current_day, 'yyyy/mm/dd') as current_day,

daily_count

FROM

tempTable

WHERE month_value='01'

INSERT INTO txn_feb

SELECT

userid,

resourceid,

doc_name,

to_date(current_day, 'yyyy/mm/dd') as current_day,

daily_count

FROM

tempTable

WHERE month_value='02'

并繼續..

總結

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