Hadoop 如何在pig中的多个加载文件中求和（查看）

我有一些问题。我想要两个加载文件中的总和视图

示例数据：

load data - 1
id name view
1  A    4
2  B    5
3  C    6

load data - 2
id name view
1  A    4
2  B    5
4  D    6

我想要输出：

output
id name view
1  A    8
2  B    10
3  C    6
4  D    6

我的猪代码：

inputdata = LOAD '/user/hdfs/tes/part-1' AS (
    id:chararray, 
    nama:chararray, 
    view:int
);


inputdata2 = LOAD '/user/hdfs/tes/part-2' AS (
    id:chararray, 
    nama:chararray, 
    view:int
);

x = UNION inputdata, inputdata2;

dump x;

如何在示例数据中求和视图2加载文件

---

谢谢。

以下是使用Group By的工作解决方案：

inputdata = LOAD '/user/hdfs/tes/part-1' USING PigStorage(' ') AS (
    id:chararray, 
    nama:chararray, 
    view:int
);


inputdata2 = LOAD '/user/hdfs/tes/part-2' USING PigStorage(' ') AS (
    id:chararray, 
    nama:chararray, 
    view:int
);

A = UNION inputdata, inputdata2;
B = group A by (id, nama);
C = FOREACH B GENERATE group.id, group.nama, SUM(B.view) AS sum_views;
DUMP C;

还有其他的可能性。

---

此链接可以帮助您：

以下是使用Group By的工作解决方案：

inputdata = LOAD '/user/hdfs/tes/part-1' USING PigStorage(' ') AS (
    id:chararray, 
    nama:chararray, 
    view:int
);


inputdata2 = LOAD '/user/hdfs/tes/part-2' USING PigStorage(' ') AS (
    id:chararray, 
    nama:chararray, 
    view:int
);

A = UNION inputdata, inputdata2;
B = group A by (id, nama);
C = FOREACH B GENERATE group.id, group.nama, SUM(B.view) AS sum_views;
DUMP C;

还有其他的可能性。

---

此链接可以帮助您：

以下是使用Group By的工作解决方案：

inputdata = LOAD '/user/hdfs/tes/part-1' USING PigStorage(' ') AS (
    id:chararray, 
    nama:chararray, 
    view:int
);


inputdata2 = LOAD '/user/hdfs/tes/part-2' USING PigStorage(' ') AS (
    id:chararray, 
    nama:chararray, 
    view:int
);

A = UNION inputdata, inputdata2;
B = group A by (id, nama);
C = FOREACH B GENERATE group.id, group.nama, SUM(B.view) AS sum_views;
DUMP C;

还有其他的可能性。

---

此链接可以帮助您：

以下是使用Group By的工作解决方案：

inputdata = LOAD '/user/hdfs/tes/part-1' USING PigStorage(' ') AS (
    id:chararray, 
    nama:chararray, 
    view:int
);


inputdata2 = LOAD '/user/hdfs/tes/part-2' USING PigStorage(' ') AS (
    id:chararray, 
    nama:chararray, 
    view:int
);

A = UNION inputdata, inputdata2;
B = group A by (id, nama);
C = FOREACH B GENERATE group.id, group.nama, SUM(B.view) AS sum_views;
DUMP C;

还有其他的可能性。

---

此链接可以帮助您：

谢谢。您的代码已成功并完成运行。谢谢你的链接参考。谢谢。您的代码已成功并完成运行。谢谢你的链接参考。谢谢。您的代码已成功并完成运行。谢谢你的链接参考。谢谢。您的代码已成功并完成运行。谢谢你的链接参考。