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Pig >> mail # user >> how can I distinct one field of a relation


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Re: how can I distinct one field of a relation
What is your desired output? Sounds like you want a group.

2012/6/26 Haitao Yao <[EMAIL PROTECTED]>

> hi,
>        How can I distinct only one field of a relation?
>        here's the demo:
>
>        A = LOAD 'data' AS (a1:int,a2:int,a3:int);
>        B = distinct A by a1;
>
>
>        how can I do this?
>
>
>
> Haitao Yao
> [EMAIL PROTECTED]
> weibo: @haitao_yao
> Skype:  haitao.yao.final
>
>