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Pig, mail # user - Count(*) operation in PIG


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Re: Count(*) operation in PIG
Russell Jurney 2012-07-26, 14:13
answer = foreach (group AA by roll) generate group as roll,
COUNT_STAR(AA) as total;

Russell Jurney http://datasyndrome.com

On Jul 26, 2012, at 6:47 AM, Alex Rovner <[EMAIL PROTECTED]> wrote:

> What pig version are you using? I believe latest versions support COUNT(*)
>
> Sent from my iPhone
>
> On Jul 26, 2012, at 3:01 AM, <[EMAIL PROTECTED]> wrote:
>
>> Hi All,
>>
>> I having a structure
>> AA: {roll: bytearray, job: bytearray,name: bytearray}
>>
>> (12,yahoo,Yogesh)
>> (13,google,Mohit)
>> (14,L.K.G ,Aashi)
>> (15,School,Renu)
>> (16,tcs,Rajat)
>> (12,yahoo, Vishu)
>> (13,google, Yogesh)
>> (14,rediff, Mohit)
>> (15,wipro, Amit)
>> (16,tcs, Nikhil)
>>
>>
>>
>> I want to count the no: of repetition of roll, or on another repeated fields, like as we do in SQL select count(*) .
>>
>>
>> Please suggest me
>>
>> Thanks & Regards
>> Yogesh Kumar
>>
>>
>>
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