Hadoop DP Notes
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What are instance variables ?
Variables that are defined at the class level are known as Instance variables. Instance
variables need not be initialized before using them as they are automatically initialized to their default values.
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What are the main components of Mapreduce Job ?
Main driver class which provides job configuration parameters. Mapper class which must extend org.apache.hadoop.mapredu...
TO_CHAR
This will be used to extract various date formats. The available date formats as follows. Syntax: to_char ( date , fo...