Difference between Pig and Hive? Why have both? [closed]

Answer 1

Have a look at Pig Vs Hive Comparison in a nut shell from a "dezyre" article

Hive is better than PIG in: Partitions, Server, Web interface & JDBC/ODBC support.

Some differences:

1. Hive is best for structured Data & PIG is best for semi structured data

2. Hive is used for reporting & PIG for programming

3. Hive is used as a declarative SQL & PIG as a procedural language

4. Hive supports partitions & PIG does not

5. Hive can start an optional thrift based server & PIG cannot

6. Hive defines tables beforehand (schema) + stores schema information in a database & PIG doesn't have a dedicated metadata of database

7. Hive does not support Avro but PIG does. EDIT: Hive supports Avro, specify the serde as org.apache.hadoop.hive.serde2.avro

8. Pig also supports additional COGROUP feature for performing outer joins but hive does not. But both Hive & PIG can join, order & sort dynamically.