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Aggregate Function SUM(expression)
The following program shows the query for this function −
Query
0: jdbc:drill:zk = local> select sum(mark1) from dfs.`/Users/../workspace/Drill-samples/student_list.json`;
Result
EXPR$0 690
Here mark1 column values are summed and then returns the result as 690.
apache_drill_query_using_json.htm
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