Web Reference: The SQL SUM () Function The SUM() function is used to calculate the total sum of values within a specified numeric column. The SUM() function ignores NULL values in the column. The following SQL returns the sum of the Quantity field in the "OrderDetails" table: The SUM function is an aggregate function that returns the sum of all or distinct values. We can apply the SUMfunction to the numeric column only. The following illustrates the syntax of the SUMfunction. The ALL operator allows you to apply the aggregate to all values. The SUM function uses the ALLoperator by default. For example, if you have a set... The SQL SUM function is a built-in aggregate function in Structured Query Language (SQL) that is used to calculate the sum of a set of values in a specified column of a table.
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