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databricks文档描述了如何对增量表进行合并。

SQL 中的语法

MERGE INTO [db_name.]target_table [AS target_alias]
USING [db_name.]source_table [<time_travel_version>] [AS source_alias]
ON <merge_condition>
[ WHEN MATCHED [ AND <condition> ] THEN <matched_action> ]
[ WHEN MATCHED [ AND <condition> ] THEN <matched_action> ]
[ WHEN NOT MATCHED [ AND <condition> ]  THEN <not_matched_action> ]

可以使用。有 python 等效项可用吗？

我正在使用chrono crate，想要计算Duration两个DateTimes 之间的值。

use chrono::Utc;
use chrono::offset::TimeZone;

let start_of_period = Utc.ymd(2020, 1, 1).and_hms(0, 0, 0);
let end_of_period = Utc.ymd(2021, 1, 1).and_hms(0, 0, 0);

// What should I enter here?
//
// The goal is to find a duration so that
// start_of_period + duration == end_of_period
// I expect duration to be of type std::time
let duration = ... 

let nb_of_days = duration.num_days();

我想实现一个子程序,它可以使用单精度,双精度和扩展精度的实数.我能想出的唯一解决方案如下面的代码所示.这个解决方案有效但我必须复制代码3次.可以避免此代码重复吗？

module mymodule
    ....
    ! some code here

    interface my_func
         module procedure my_func_sp
         module procedure my_func dp
         module procedure my_func_ep
    end interface

contains
    subroutine my_func_sp(x,y)
         real(kind=sp), dimension(:) :: x,y

         ... LONG IMPLEMENTATION HERE ...

    end subroutine

    subroutine my_func_dp(x,y)
         real(kind=dp), dimension(:) :: x,y

         ... LONG IMPLEMENTATION HERE THAT IS EXACTLY THE SAME AS ABOVE ...

    end subroutine


    subroutine my_func_ep(x,y)
         real(kind=ep), dimension(:) :: x,y

         ... LONG IMPLEMENTATION HERE THAT IS EXACTLY THE SAME AS THE TWO ABOVE ...

    end subroutine
end module