Aggregate Functions
COUNT
Returns the number of rows matching the query criteria.
SELECT COUNT(*) FROM Files WHERE FileId = '119116'
COUNT
Returns the number of rows matching the query criteria.
SELECT COUNT(Length) FROM Files WHERE FileId = '119116'
COUNT(DISTINCT)
Returns the number of distinct, non-null field values matching the query criteria.
SELECT COUNT(DISTINCT FileId) AS DistinctValues FROM Files WHERE FileId = '119116'
AVG
Returns the average of the column values.
SELECT ChildrenNum, AVG(Length) FROM Files WHERE FileId = '119116' GROUP BY ChildrenNum
MIN
Returns the minimum column value.
SELECT MIN(Length), ChildrenNum FROM Files WHERE FileId = '119116' GROUP BY ChildrenNum
MAX
Returns the maximum column value.
SELECT ChildrenNum, MAX(Length) FROM Files WHERE FileId = '119116' GROUP BY ChildrenNum
SUM
Returns the total sum of the column values.
SELECT SUM(Length) FROM Files WHERE FileId = '119116'