使用此选项：

data = LOAD '/abc.txt' USING PigStorage(',') AS (name:chararray, number:chararray,result:chararray);
B = GROUP data by (name,result);
C = foreach B generate FLATTEN(group) as (name,result), COUNT(data) as count;

答案是：

(a,false,4)
(a,Correct,1)
(b,false,3)
(b,Correct,2)

希望这是你想要的产品

对于共享的用例，下面的pig脚本就足够了。
Pig脚本：

student_data = LOAD 'student_data.csv' USING PigStorage(',') AS (student_name:chararray, question_number:chararray, actual_result:chararray);
student_data_grp = GROUP student_data BY student_name;
student_correct_answer_data = FOREACH student_data_grp {
    answers = student_data.actual_result;
    correct_answers = FILTER answers BY actual_result=='Correct';
    incorrect_answers = FILTER answers BY actual_result=='false';
    GENERATE group AS student_name, COUNT(correct_answers) AS correct_ans_count, COUNT(incorrect_answers) AS incorrect_ans_count ;
};

输入：student\ u data.csv：

b,q1,Correct
a,q1,false
b,q2,Correct
a,q2,false
b,q3,false
a,q3,Correct
b,q4,false
a,q4,false
b,q5,false
a,q5,false

输出：转储kpi:

-- schema : (student_name, correct_ans_count, incorrect_ans_count)
(a,1,4)
(b,2,3)

参考：更多关于嵌套的细节
http://pig.apache.org/docs/r0.12.0/basic.html#foreach
http://chimera.labs.oreilly.com/books/1234000001811/ch06.html#more_on_foreach