我有一个Hive外部表作为TEXTFILE FORMAT hive> SHOW CRAETE TABLE customers; CREATE EXTERNAL TABLE `customers`( `id` int, `name` string, `age` int, `address` string, `salary` double) COMMENT 'Customer Details' ROW FORMAT SERDE 'org.apache.hado...

I was solving this example : https://www.windowfunctions.com/questions/grouping/6 Here, they use Oracle or postgres command nth_value to get the answer, but this is not implemented in Hive SQL which is used by pyspark and I was wondering how to obtain the ...

我有一个用例，可以向timestamp列中添加一些值并从中得出日期。我正在尝试使用from_unix和unix_timestamp函数。但是它以不同的格式显示了不同的值。 select from_unixtime('1577582583', 'YYYY-MM-dd'), from_unixtime('1577582583', 'yyyy-MM-dd'); from_unixtime(CAST(1577582583 AS BIGINT), YYYY-MM-dd) from_unixtime(CAST(...