Sqoop

41.Give a Sqoop command to import all the records from employee table divided into groups of records by the values in the column department_id. $ sqoop import –connect jdbc:mysql://db.foo.com/corp –table EMPLOYEES \ –split-by dept_id (204)

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31.In a sqoop import command you have mentioned to run 8 parallel Mapreduce task but sqoop runs only 4. What can be the reason? The Mapreduce cluster is configured to run 4 parallel tasks. So the sqoop command must have…

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21.How do you clear the data in a staging table before loading it by Sqoop? By specifying the –clear-staging-table option we can clear the staging table before it is loaded. This can be done again and again till we get…

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11.How can you avoid importing tables one-by-one when importing a large number of tables from a database? Using the command sqoop import-all-tables –connect –usrename –password –exclude-tables table1,table2 .. This will import all the tables except the ones mentioned in the…

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1.What is the role of JDBC driver in a Sqoop set up? To connect to different relational databases sqoop needs a connector. Almost every DB vendor makes this connecter available as a JDBC driver which is specific to that DB.…

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