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'