SQL remains the foundation for turning raw records into reports and business insights across industriesCore queries like ...
* your query should return LastName & the sum of Age from your table for all users with a LastName = Smith* * The column title of the summed ages should be SumAge. Your output should look like the ...
Returns the sum of all the values, or only the DISTINCT values, in the expression. SUM can be used with numeric columns only. Null values are ignored. SUM is a deterministic function when used without ...
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