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Hive Join

Apache Hive Join commands for beginners and professionals with examples on hive, hive inner join, left outer join, right outer join, full outer joins, pig, hbase, hdfs, mapreduce, oozie, zooker, spark, sqoop

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Hive Join

Let's see two tables Employee and EmployeeDepartment that are going to be joined.

Employee department table hive DML operation

Inner joins

Select  *  from employee join employeedepartment  ON (employee.empid=employeedepartment.empId)

Output : <<InnerJoin.png>>

Left outer joins

Select e.empId, empName, department from employee e Left outer join employeedepartment ed on(e.empId=ed.empId);

Output : <<LeftOuterJoin.png>>

Right outer joins

Select e.empId, empName, department from employee e Right outer join employeedepartment ed on(e.empId=ed.empId);

Full outer joins

Select e.empId, empName, department from employee e FULL outer join employeedepartment ed on(e.empId=ed.empId);
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