Comparing PIG with Hive SQL

In PIG

a = LOAD 'nyse' USING org.apache.hcatalog.pig.HCatLoader();
b = FILTER a BY stock_symbol =='IBM' ;
c = group b all;
d = foreach c generate AVG(b.stock_volume);
dump d;

In SQL (Hive)

select AVG(stock_volume) from nyse where stock_symbol =="IBM"

(from HDP 2.0 Horton Sandbox Example)

Also see

http://www.quora.com/How-can-R-and-Hadoop-be-used-together