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sqoop Import RDBMS Table to HDFS 

sqoop import \
--connect  <rdbms-jdbc-url> \
--username  <username> \
--password  <password> \
--table  <table-name>
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  • Example with Mysql:
    • sqoop import \
--connect jdbc:mysql://mysql.example.com/testdb \
--username root \
--password root \
--table employees
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  • CSV file with the imported data will be created under employees directory under home directory.
  • Inspect using command: 
    • hadoop fs -cat  <hdfs-home-dir>/employees/part-m-*
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  • Import to a particular directory in HDFS
    • sqoop import \
--connect jdbc:mysql://mysql.example.com/testdb \
--username root \
--password root \
--table emplyoees \
--target-dir /dev/data/employees
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  • This will generate CSV file under /dev/data/employees directory.
  • Specify parent HDFS directory for Sqoop job
    • sqoop import \
--connect jdbc:mysql://mysql.example.com/testdb \
--username root \
--password root \
--table emplyoees \
--warehouse-dir /dev/warehouse/
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  • --warehouse-dir tag in above command will change your home directory to /dev/warehouse/

    • Import subset of RDBMS Table to HDFS

  • Using --where tag 
    • sqoop import \
--connect  <rdbms-jdbc-url> \
--username  <username> \
--password  <password> \
--table  <table-name> \
--where "<condition>"
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    sqoop import \
--connect jdbc:mysql://mysql.example.com/testdb \
--username root \
--password root \
--table employees \
--where "country = 'INDIA'"
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  • Any special functions, conversions, or even user-defined functions can be used in --where clause.

    • Using Free Form Query

    sqoop import \
--connect  <rdbms-jdbc-url> \
--username  <username> \
--password  <password> \
--query  <sql-query> \
--target-dir  <target-dir>
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    SQOOP forum

    Sqoop Installation and Download :

    Connecting Sqoop to other databases/datastores :

  • Import data directly into Hive Warehouse
  • Import data from RDBMS to HBase table
  • Import data to new catalog
  • Import the results of a query from a relational database into HDFS
  • Load JDBC Driver

    • Sqoop Export :

  • Sqoop Export basic example

    • Sqoop Import RDBMS Table to HDFS :

  • Sqoop Import RDBMS Table to HDFS

    • Merge data-sets imported via incremental import using Sqoop :

  • Import New as well as Updated Data - lastmodified mode - Append Mode

    • Hadoop with Kite SDK :

  • Kite SDK to demonstrate copying of various file formats to Hadoop

    • Sqoop Advanced :

  • Use Sqoop to copy an Oracle table to Hadoop

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