如何使用星期六作为星期结束日期来计算星期结束日期？

问题描述：

我有一个场景，我想计算周结束日期（给定一个日期），考虑周周末结束。我读了一些答案，但找不到解决方案，所以我在这里发布我的方法。希望它能帮助像我这样的人。如何使用星期六作为星期结束日期来计算星期结束日期？

select 
TransactionDateTime, 
from_unixtime(unix_timestamp(TransactionTime),'u') as wkday, 
date_add (TransactionDateTime, 
case when from_unixtime(unix_timestamp(TransactionTime),'u')=7 then 6 
when from_unixtime(unix_timestamp(TransactionTime),'u')=1 then 5 
when from_unixtime(unix_timestamp(TransactionTime),'u')=2 then 4 
when from_unixtime(unix_timestamp(TransactionTime),'u')=3 then 3 
when from_unixtime(unix_timestamp(TransactionTime),'u')=4 then 2 
when from_unixtime(unix_timestamp(TransactionTime),'u')=5 then 1 
when from_unixtime(unix_timestamp(TransactionTime),'u')=6 then 0 
end) as UsageWkEndDt 
from TransTable;

请删除你的答案 – Yossi

你给实际的输入格式没有例子，和预期产出没有例子，例如*“给出一个字符串'2016-03-03 21:05'指向一个星期四，我期待一个字符串'2016-03-05'即下一个或相等的星期六”* –

而且你不给Hive版本 - 从V1.2.0开始，你有内置函数'next_day（string start_date，string day_of_week）'cf. https://cwiki.apache.org/confluence/display/Hive/LanguageManual+UDF#LanguageManualUDF-DateFunctions –

答

select 
TransactionDateTime, 
from_unixtime(unix_timestamp(TransactionTime),'u') as wkday, 
date_add (TransactionDateTime, 
case when from_unixtime(unix_timestamp(TransactionTime),'u')=7 then 6 
when from_unixtime(unix_timestamp(TransactionTime),'u')=1 then 5 
when from_unixtime(unix_timestamp(TransactionTime),'u')=2 then 4 
when from_unixtime(unix_timestamp(TransactionTime),'u')=3 then 3 
when from_unixtime(unix_timestamp(TransactionTime),'u')=4 then 2 
when from_unixtime(unix_timestamp(TransactionTime),'u')=5 then 1 
when from_unixtime(unix_timestamp(TransactionTime),'u')=6 then 0 
end) as UsageWkEndDt 
from TransTable;

如何使用星期六作为星期结束日期来计算星期结束日期？

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