![]() I have created a new table named Sales in my test database TESTDB for this demonstration. Next, I will provide you with the details about my source table on which I will demonstrate all use cases of the SQL SUM function. Expression is a column, function, or any combination of the arithmetic, bitwise, and string operators.DISTINCT as its name suggests, SQL Server only considers unique values to return the result and duplicate values will be ignored.It is the default argument and if you will not specify any argument then SQL Server considers it as ALL and return the result accordingly ALL means all values will be considered to get the result.The syntax of this function is given in the below statement. ![]() This function will ignore NULL values present in the columns. The SQL SUM() function returns the sum of all values or the sum of only values specified through conditional expressions. This article is intended for the SQL SUM () function so let’s start discussing this in this article. There are additional aggregate functions as well in SQL Server which I have listed below for your reference: The SQL SUM function is an aggregate function that is used to perform a calculation on a set of values from a specified expression and return a single value in their output. We can use SQL Server system function SUM () to easily get the sum of the values stored in a numeric column of the table. One such requirement is to get the sum of values stored in a numeric column. SQL Server offers various system functions which I have listed below to get these mathematical calculations easily by using them. There are various mathematical calculations we need to do in day-to-day business requirements. Today, I will describe the SQL SUM () function along with its use cases in this article.
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