Hadoop DP Notes
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How to convert an object into string ?
We can use “toString” method to convert an object to string. For example
Java
Object O = new Object();
System.out.println(O.toString());
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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...