Hive presto和hive时间格式转换

时间:2021-08-23 13:04:55

1、北京时间格式   to   unix时间格式

数据格式:

2017-11-17 08:28:13

2017-11-17 08:28:10

2017-11-17 08:27:51.343

2017-11-17 08:27:48.021

presto单个标准时间转化(10位unix):

select to_unixtime(cast ('2017-08-30 10:36:15' as timestamp))

hive单个标准时间转化(10位unix):

select unix_timestamp(cast ('2017-08-30 10:36:15' as timestamp))

presto单个毫秒时间转化(13位unix):

select to_unixtime(cast ('2017-12-01 16:42:08.771' as timestamp))

hive单个毫秒时间转化(自动转为10位unix):

select unix_timestamp(cast ('2017-12-01 16:42:08.771' as timestamp))

presto变量转化(根据时间格式分别转化为10位unix、13位unix):

select to_unixtime(cast (time as timestamp))

from table1

hive变量转化(只能自动转化为10位unix):

select unix_timestamp(cast (time as timestamp))

from table1

where d = '2017-12-05'

2、unix时间格式   to  北京时间格式

数据格式:

1510894478

1510855235

1510855290929

1510873252377

presto单个10位unix(变为标准格式):

select format_datetime(from_unixtime(1510284058),'yyyy-MM-dd HH:mm:ss')

hive单个10位unix(变为标准格式):

select from_unixtime(1323308943123,'yyyy-MM-dd HH:mm:ss')

presto单个13位unix(毫秒格式):

select format_datetime(from_unixtime(1510284058.415),'yyyy-MM-dd HH:mm:ss.mmm')

hive单个13位unix(毫秒格式):手动截取10位

select from_unixtime(cast(substr(1323308943123,1,10) as int),'yyyy-MM-dd HH:mm:ss')

Presto  13、10位unix变量转化(只能截取成10位转化成标准格式):

select format_datetime(from_unixtime(cast(substr(ts,1,10) as double)),'yyyy-MM-dd HH:mm:ss')  from table1

hive变量转化(事先截取10位unix):

select from_unixtime(cast(substr(ts,1,10) as int),'yyyy-MM-dd HH:mm:ss')

from table1

where d = '2017-12-05'