How to use Aggregate functions on a single column tables

This topic contains 0 replies, has 1 voice, and was last updated by  Mohan kumar Dalai 9 months, 1 week ago.

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  • #52189

    Mohan kumar Dalai
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    Hi,
    I would like to know the way to apply aggregate function on a single column table.
    Orders = load ‘Orders’ using org.apache.hcatalog.pig.HCatLoader();
    Order_emp = FOREACH Orders GENERATE $2 as employeeid;

    Now I would like to apply the aggregate functions on the Order_emp.employeeid attribute. Please dont suggest me to group on any other column. Kindly provide a solution assuming the table ‘Orders’ has only one column.

    Thanks in Advance,
    Mohan

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