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Apache Tajo - SUM(expression)
Let us now check sum(exp) function with the following query.
Query
sampledb> select sum(mark) as sum from mytable;
Result
The above query will generate the following result.
sum ------------------------------- 755
The query returns the summation of marks from mytable. Total summation of mark column is 755.
apache_tajo_aggregate_and_window_functions.htm
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