Question

在下表中，有特定R_ID和F_ID的跟踪。 Col_C =＆＃39; 10＆＃39;标志着周期中的最后一个条目。 ENTRY =＆＃39; 1＆＃39;意味着新的进入和ENTRY =＆＃39; 2＆＃39;表示在同一日期修改现有条目。 ENTRY =＆＃39; 2＆＃39;意味着它是最新的条目

F_ID    R_ID    DATE    ENTRY   Col_A   Col_B   Col_C   Score_1    Score_2  Score_3
85     158   20161005    1       99      99      01        0         0        0
85     158   20161010    1       01      99      99        3         2        2
85     158   20161010    2       01      99      99        3         2        2
85     158   20161012    1       01      01      99        3         2        2
85     158   20161012    2       01      01      99        3         2        2
85     158   20161019    1       99      02      99        3         2        2
85     158   20161022    1       99      99      10        3         2        2
85     158   20161022    2       99      99      10        3         1        2

我需要选择这样才能获得

的记录

 1. The most recent final entry i.e Col_C = '10' 
and if Col_C = '10' and ENTRY = '1' or '2' for the same DATE 
then select the one with ENTRY = '2'

and

 2. records with Col_A or Col_B = '01' and Col_C != '10' 
where the date just precedes(before) the DATE of final entry. 
Also if Col_A or Col_B = '01'and if ENTRY = '1' or '2' for the same DATE 
then select the one with ENTRY = '2'

对于结果我正在寻找像

这样的东西


F_ID   R_ID    DATE    ENTRY   Col_A   Col_B   Col_C   Score_1    Score_2  Score_3
85     158   20161012    2       01      01      99        3         2        2
85     158   20161022    2       99      99      10        3         1        2

我尝试了以下

select * from tbl T where Col_C = '10' and T.date=(select min (T2.date) from tbl T2 where T2.Col_C = '10' and T2.R_ID = T.R_ID
           and T2.F_ID = T.F_ID)


union 


select * from
(
select *
from tbl k
where (k.Col_A = '01' or k.Col_B = '01')
  and k.Col_A <> k.Col_B
  and k.Col_C <> '10'
  k.date =
        (select min (k2.date) from tbl k2
           where (k2.Col_A='01' or k2.Col_B='01') and 
           k2.Col_A <> k2.Col_B and 
           k2.Col_C <> '10' and
           k2.R_ID = k.R_ID
           and k2.F_ID = k.F_ID
        )


union 

select *
  from tbl  S
  where S.Col_A = '01' and S.Col_B = '01' and S.Col_C <> '10'
    and S.date =
        (select min (S2.date) from tbl S2
           where S2.Col_A='01' and S2.Col_B='01' and S2.Col_C <> '10' and
           S2.R_ID = S.R_ID
           and S2.F_ID = S.F_ID
        )
)

我无法确定最新的最终条目（Col_C =＆＃39; 10＆＃39;最近的日期）和之前的条目（Col_A或Col_B =＆＃39; 01＆＃39;日期）的逻辑就在最后的参赛作品之前）

每个F_ID，R_ID我需要2条记录。最后一个条目和一个前一个条目

感谢。

Answer 1

您可以尝试以下查询 -

SELECT F_ID, R_ID, DATE, MAX(ENTRY), Col_A, Col_B, Col_C, Score_1, Score_2, Score_3
FROM YOUR_TABLE
WHERE Col_C = '10'
GROUP BY DATE
UNION ALL
SELECT F_ID, R_ID, DATE, MAX(ENTRY), Col_A, Col_B, Col_C, Score_1, Score_2, Score_3
FROM YOUR_TABLE
WHERE (Col_A = '01' OR Col_B = '01')
AND Col_C <> 10
GROUP BY DATE
HAVING DATE < MAX(DATE)

虽然我没有尝试过此查询，但我认为这可以帮助您。

从刚好在给定日期和多个条件之前的日期中选择记录

1 个答案: