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Cassandra query language (CQL) and Cassandra Java Client Example

Cassandra Table structure/Terminology Before going to learn CQL commands, we just need to know terminology in cassandra. RDBMS Cassandra Terminology Database Keyspace Table Column Family Primary key Row Key Column name Column name Column value column value CQL Commands Creating a key-space

Use the keyspace (will use that key space)

Note: key spaces are equivalent to database/schema in RDBMS Get list of key spaces

Create table

Get list […]


Sqoop Export Commands 1

Below are some Sqoop Export Commands and Other Miscellaneous commands Sqoop-export It is nothing but exporting data from HDFS to database. To use ‘export‘ command, a table in database should already exist. then only export functionality in sqoop will works. export command will works in two ways 1. insert 2. update 1. insert: insert mode will insert the new records from HDFS to RDBMS table. command:

Note: if a […]


Review Comments
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I am a plsql developer. Intrested to move into bigdata.

Neetika Singh ITA Hadoop in Dec/2016 December 22, 2016

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