Question

本网站上的第一篇文章，请让我知道它是否配方齐全。

某些情况：我工作的地方有一个接机柜台，我们希望看到三个单独交易的 MIN 时间戳。输入的时间，首次挑选的时间，发货的时间是三个变量。它要求我在同一列中 MIN 三个单独的时间，每个时间条件不同。这就是我陷入困境的地方：

SELECT CONTROL_NUMBER, MIN(START_TRAN_TIME) AS START_T, 
       MIN(START_TRAN_TIME) AS PICK_T, 
       MIN(START_TRAN_TIME) AS SHIP_T
FROM T_TRAN_LOG
WHERE  WH_ID = 'W376' ....

时间戳由事务类型（TRAN_TYPE）变量决定。 - START_T列是TRAN_TYPE等于＆＃39; 961＆＃39; - PICK_T列是tran_type等于＆＃39; 306＆＃39; - SHIP_T列是tran_type等于＆＃39; 340＆＃39;

的列

tran type         start_tran_time
   340             6/18/2018 8:14
   306             6/18/2018 8:10

我不知道如何从这里开始，我已经自学了很多SQL，所以非常感谢任何帮助。

谢谢，

Answer 1

您可以使用案例何时选择不同的tran类型：

org.tensorflow.TensorFlowException: Op type not registered
'NonMaxSuppressionV3' in binary running on localhost. Make sure the Op 
and Kernel are registered in the binary running in this process. Note 
that if you are loading a saved graph which used ops from tf.contrib,
accessing (e.g.) `tf.contrib.resampler` should be donebefore importing the
graph, as contrib ops are lazily registered when the module is first accessed.

Answer 2

合并case/when和min

select
  CONTROL_NUMBER, 
  Min(case when tran_type = '961' then START_TRAN_TIME else null end) AS START_T, 
  Min(case when tran_type = '306' then START_TRAN_TIME else null end) AS PICK_T, 
  Min(case when tran_type = '340' then START_TRAN_TIME else null end) AS SHIP_T, 
from
  T_TRAN_LOG
where
  WH_ID = 'W376' 
Group by
  CONTROL_NUMBER

Answer 3

我认为你可以尝试这样的事情：

    SELECT CONTROL_NUMBER 
from T_TRAN_LOG pivot
(
    MIN(START_TRAN_TIME) for PICK_T 
                                in('961' as "START_T",
                                '306' as "PICK_T" ,
                                '340' as "SHIP_T")
                                )
where WH_ID = 'W376' ...

我不知道这是否是您问题的答案，因为我没有完整的数据。

多次相同列的最小值

3 个答案: