Sql server group by sum null

Creates a group for each combination of column expressions. In addition, it "rolls up" the results into subtotals and grand totals. To do this, it moves from right to left decreasing the number of column expressions over which it creates groups and the aggregation s. In addition, it creates subtotals for each value of Country. Finally, it gives a grand total for all rows. The result looks like this:. The results look like this:. Specifies the empty group which generates the grand total. For example, this statement gives the total sales for each country and then gives the grand-total for all countries.

This syntax is provided for backward compatibility only. It will be removed in a future version. Avoid using this syntax in new development work, and plan to modify applications that currently use this syntax. Specifies to include all groups in the results regardless of whether they meet the search criteria in the WHERE clause.

This is the place for advice and discussions 8 2. Sign in to vote. Thursday, July 14, AM. Like this? Aggregate functions ignore null values. Hi, try this: select SUM case when col is null then col end from tablename Or select sum col from tablename where col is null Thanks and regards, Rishabh , Microsoft Community Contributor.

I cannot give "where col is null". Asked 6 years ago. Active 6 years ago. Viewed 2k times. Any ideas? I'm using SQL Server Improve this question. Can you please show your current query? Add a comment. Active Oldest Votes. Improve this answer. Giorgi Nakeuri Giorgi Nakeuri The code above illustrates this behavior.

As we can see the NULLs are ignored. The following example answers this question:. One more thing about initialization of variables: when a variable has been declared and has not been initialized, it's value is NULL, and any operation with this variable makes the result NULL:.

Finally let's answer this question: What will be the result when we are checking the 'non-equality' and the value of one of the operands or both is NULL? Often developers mistakenly think that the result will be 'true', because NULL is not equal to any value.