Creating Date-Partitioned Tables in BigQuery Reviews

RAMA MANIKANTA P. · Reviewed больше 3 лет ago

Yaretzin A. · Reviewed больше 3 лет ago

Using CTE makes more readable query than using subquery ``` #standardSQL CREATE OR REPLACE TABLE ecommerce.days_with_rain2 PARTITION BY date OPTIONS ( partition_expiration_days=60, description="weather stations with precipitation, partitioned by day" ) AS WITH gsod AS ( SELECT DATE(CAST(year AS INT64), CAST(mo AS INT64), CAST(da AS INT64)) AS date, prcp, stn FROM `bigquery-public-data.noaa_gsod.gsod*` AS weather WHERE prcp < 99.9 -- Filter unknown values AND prcp > 0 -- Filter stations/days with no precipitation AND _TABLE_SUFFIX >= '2018' ), stations AS ( SELECT usaf, ANY_VALUE(name) AS name FROM `bigquery-public-data.noaa_gsod.stations` GROUP BY usaf ) SELECT gsod.date AS date, stations.name AS station_name, gsod.prcp AS prcp FROM gsod LEFT JOIN stations ON gsod.stn = stations.usaf ```

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