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WITH

The WITH clause defines a common table expression (CTE), which is a temporary named result set. The definition of a CTE includes its name, an optional list of column names, and a query expression (that is, a SELECT statement).

For more information about SELECT statements, see SELECT.

Syntax 
[ WITH <cte_name> [ ( <cte_column1>, <cte_column2>, ... ) ]
    AS ( <query> ) 
]
SELECT ...

Parameters​

[ WITH <cte_name> [ ( <cte_column1>, <cte_column2>, ... ) ] AS ( <query> ) ] String   Optional

A temporary named result set for use in the statement that defines the CTE.

  • <cte_name>: The name of the CTE you are defining. The CTE must have a unique name within a given query.
  • <cte_column#>: The names of the columns from the query that defines the CTE.
  • AS <query>: The query (SELECT) statement that defines the CTE.

Examples​

Query an existing table using a CTE clause 
WITH cte_quantity (Total)
  AS (
      SELECT SUM(passenger_count) as Total
      FROM Samples."samples.dremio.com"."NYC-taxi-trips" where passenger_count > 2
      GROUP BY pickup_datetime
      )
SELECT AVG(Total) average_pass
FROM cte_quantity