hadoop script language

- Pig, from Yahoo! and now incubating at Apache, has an imperative language called Pig Latin for performing operations on large data files.

- Jaql, from IBM and soon to be open sourced, is a declarative query language for JSON data.

- Hive, from Facebook and soon to become a Hadoop contrib module, is a data warehouse system with a declarative query language that is a hybrid of SQL and Hadoop streaming.

http://www.lexemetech.com/2008/06/hadoop-query-languages.html
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