Hadoop Sqoop Functions
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Sqoop Import: This Command is used to transfer data from MySQL to hdfs.
Sqoop import all: This command is used to import all tables present in the selected database.
Import only subset of data: In this, we import data with particular Parameters
Importing New Data: Used to import the new data inserted into the particular table
Incrementally importing Mutable data : Used to import data with timestamp value
sqoop import –connect jdbc:mysql://mysql.example.com/sqoop –username root -P –table emp –incremental lastmodified –check-column last_update_date –last-value “2019-01-29 23:52:11”
Data Validation: Used to validate data in the table.
sqoop import –connect jdbc:mysql://localhost/retail_db –table customers –username root -P –validate –verbose –target-dir /
Case 1: No data loss or change during transfer of Data
Case 2: Data loss during transfer.
Sqoop Job: This command is used to create a job with a particular function and can be used again and again without writing the whole command.
Sqoop eval: To find out the change in the table.