Hive date/timestamp/date_sub/date_add/date_format/日期时间格式转换

Posted 2022-10-24 二十六画生的博客

-- Hive 只有date（'2022-06-09'）、TIMESTAMP（'2022-07-15 02:21:32.000000'） 2个日期类型,没有datetime类型。

select
    now(),
    current_timestamp(),
    current_date(),
    date_sub(current_date(), 2),
    date_add(current_date(), 2),
    date_add('2022-06-09', 2) as c2,
    date_sub('2022-06-09 12:13:14', 2) as c3,
    date_format('2022-06-09 12:13:14', 'dd-MM-yyyy') as c4,
    date_format('2022-06-09 12:13:14', 'yyyy-MM-dd') as c5,
    date_format('2022-06-09 12:13:14', 'yyyy-MM') as c6,
    date_format('2022-06-09 12:13:14', 'MM') as c7,
    date_format(current_date(), 'MM') as c8,
    from_unixtime(1657851692, 'yyyy-MM-dd HH:mm:ss') as c9,
    date_sub(
        from_unixtime(1657851692, 'yyyy-MM-dd HH:mm:ss'),
        2
    ) as c10,
    to_date('2018-12-08 10:03:01'),
    date_sub(to_date('2018-12-08 10:03:01'), 2),
    cast('2022-05-10' as date) c11,
    date_sub(cast('2022-05-10' as date), 2) as c12,
    date_format(cast('2022-05-10' as date), 'MM') as c13,
    --cast('2018-12-08 10:03:01' as datetime) as c14, --UnsupportedOperationException: Sql 1 class org.apache.calcite.sql.SqlIdentifier: datetime
    weekofyear('2022-07-15') as c15,
    cast(1657851692 as timestamp) as c16, --2022-07-15 02:21:32.000000
    date_format(cast(1657851692 as timestamp), 'yyyy-MM-dd') as c17, --2022-07-15
    date_format(now(), 'yyyy-MM-dd') as c18, --2022-07-15
    quarter('2022-11-10') as c19,
    add_months('2022-07-15', 2) as c20,
    add_months('2022-07-15', -2) as c21,
    date_sub(cast(1657851692 as timestamp), 2) as c22
     --add_years('2022-07-15', 2) as c22, --No match found for function signature add_years(<CHARACTER>, <NUMERIC>)
    --add_days('2022-07-15', 2) as c23 --No match found for function signature add_days(<CHARACTER>, <NUMERIC>)

 

 

 Hive版本：

select version();

3.0.1 b426c....

务必注意输入类型和返回类型！

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