Hadoop DP Notes
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USING TRUNCATE
This can be used to delete the entire table data permanently.
Syntax:
truncate table <
table_name
>;
Ex:
SQL>
truncate table student;
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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...