Aggregate Functions
Examples of Aggregate Functions
Below are several examples of SQL aggregate functions. You can use these with a GROUP BY clause to aggregate rows based on the specified GROUP BY criterion. This can be a reporting tool.
COUNT
Returns the number of rows matching the query criteria.
SELECT COUNT(*) FROM Schemas WHERE ProjectId = 'bigquery-public-data'
COUNT(DISTINCT)
Returns the number of distinct, non-null field values matching the query criteria.
SELECT COUNT(DISTINCT Type) AS DistinctValues FROM Schemas WHERE ProjectId = 'bigquery-public-data'
AVG
Returns the average of the column values.
SELECT DatasetName, AVG(AnnualRevenue) FROM Schemas WHERE ProjectId = 'bigquery-public-data' GROUP BY DatasetName
MIN
Returns the minimum column value.
SELECT MIN(AnnualRevenue), DatasetName FROM Schemas WHERE ProjectId = 'bigquery-public-data' GROUP BY DatasetName
MAX
Returns the maximum column value.
SELECT DatasetName, MAX(AnnualRevenue) FROM Schemas WHERE ProjectId = 'bigquery-public-data' GROUP BY DatasetName
SUM
Returns the total sum of the column values.
SELECT SUM(AnnualRevenue) FROM Schemas WHERE ProjectId = 'bigquery-public-data'
COUNT
Returns the number of rows matching the query criteria.
SELECT COUNT(*) FROM Schemas WHERE ProjectId = 'bigquery-public-data'
COUNT(DISTINCT)
Returns the number of distinct, non-null field values matching the query criteria.
SELECT COUNT(DISTINCT Type) AS DistinctValues FROM Schemas WHERE ProjectId = 'bigquery-public-data'
AVG
Returns the average of the column values.
SELECT DatasetName, AVG(AnnualRevenue) FROM Schemas WHERE ProjectId = 'bigquery-public-data' GROUP BY DatasetName
MIN
Returns the minimum column value.
SELECT MIN(AnnualRevenue), DatasetName FROM Schemas WHERE ProjectId = 'bigquery-public-data' GROUP BY DatasetName
MAX
Returns the maximum column value.
SELECT DatasetName, MAX(AnnualRevenue) FROM Schemas WHERE ProjectId = 'bigquery-public-data' GROUP BY DatasetName
SUM
Returns the total sum of the column values.
SELECT SUM(AnnualRevenue) FROM Schemas WHERE ProjectId = 'bigquery-public-data'