You use Sql Sum to add up values of a numeric column. The keyword 'Distinct' works for this function, it will ignore the Null values in the calculation.
Example: Let's use a simple table to illustrate. Expenses table, find out how much spent so far.
|1001||1/07/2009 12:00:00 AM||Long Black Coffee||1||3.00|
|1002||1/07/2009 12:00:00 AM||Newspaper||5||1.00|
|1003||1/07/2009 12:00:00 AM||Morning Tea||1||4.00|
|1004||1/07/2009 12:00:00 AM||Lunch||1||8.00|
|1005||1/07/2009 12:00:00 AM||Dinner||1||12.00|
|1006||1/07/2009 12:00:00 AM||Magazine PC World||5||11.00|
The core of Sql, selecting data from table.
Conditionally selecting rows from table.
Eliminating duplicate values in the output.
Counting number of rows.
This function will return the highest value.
This function will return the lowest value.
This function will return the average value.
Sql Order By
Sorting the output
Sql And Or
Connecting two or more conditions in the Where or Having clause.
Sql Group By
Grouping rows into sets.
To filter the result of aggregation
Pattern searching for conditions in Where or Having clause
Added to conditions to show results between two values.
Return from Sql Sum to Sql Commands
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