RaqForum 41 No.
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Get the whole group where at least one member meets the specified condition

 

The csv file below consists of student names and student scores:

Name,Score

A,17

A,19

A,22

B,17

B,15

C,22

D,19

E,22

E,22

Task: Use Java to find all records of students who has at least one score that is equivalent to or greater than 20.

Name

Score

A

17

A

19

A

22

C

22

E

22

E

22

Write the following SPL statement:

=T(""d:\\data.csv"").group(Name).select(~.count(Score>=20)>0).conj()

T()function parses the csv file as a two-dimensional table. group() function groups data while retaining records in each group. ~ is the current group; count() function gets the number of records meeting the specified condition.

Read How to Call a SPL Script in Java to find how to integrate SPL into a Java application.
Source:https://stackoverflow.com/questions/75799714/spark-java-group-by-and-filter-on-custom-condition


 
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