How to select current date in Hive SQL

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谎友^
谎友^ 2020-12-24 00:11

How do we get the current system date in Hive? In MySQL we have select now(), can any one please help me to get the query results. I am very new to Hive, is there a proper d

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  • 2020-12-24 00:42

    Yes... I am using Hue 3.7.0 - The Hadoop UI and to get current date/time information we can use below commands in Hive:

    SELECT from_unixtime(unix_timestamp()); --/Selecting Current Time stamp/
    
    SELECT CURRENT_DATE; --/Selecting Current Date/
    
    SELECT CURRENT_TIMESTAMP; --/Selecting Current Time stamp/
    

    However, in Impala you will find that only below command is working to get date/time details:

    SELECT from_unixtime(unix_timestamp()); --/Selecting Current Timestamp /
    

    Hope it resolves your query :)

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  • 2020-12-24 00:53
    select from_unixtime(unix_timestamp(current_date, 'yyyyMMdd'),'yyyy-MM-dd');
    

    current_date - current date

    yyyyMMdd - my systems current date format;

    yyyy-MM-dd - if you wish to change the format to a diff one.

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  • 2020-12-24 00:58

    To fetch only current date excluding time stamp:

    in lower versions, looks like hive CURRENT_DATE is not available, hence you can use (it worked for me on Hive 0.14)

    select TO_DATE(FROM_UNIXTIME(UNIX_TIMESTAMP()));
    

    In higher versions say hive 2.0, you can use :

    select CURRENT_DATE;
    
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  • 2020-12-24 00:58

    To extract the year from current date

    SELECT YEAR(CURRENT_DATE())
    

    IBM Netezza

    extract(year from now())
    

    HIVE

    SELECT YEAR(CURRENT_DATE())
    
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  • 2020-12-24 00:59

    The functions current_date and current_timestamp are now available in Hive 1.2.0 and higher, which makes the code a lot cleaner.

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  • 2020-12-24 01:06

    According to the LanguageManual, you can use unix_timestamp() to get the "current time stamp using the default time zone." If you need to convert that to something more human-readable, you can use from_unixtime(unix_timestamp()).

    Hope that helps.

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