How to choose the latest partition in BigQuery table?

Question

I am trying to select data from the latest partition in a date-partitioned BigQuery table, but the query still reads data from the whole table.

I\'ve tried (as far a

Answer 1

A compromise that manages to query only a few partitions without resorting to scripting or failing with missing partitions for fixed dates.

WITH latest_partitions AS (
  SELECT *, _PARTITIONDATE AS date
  FROM `myproject.mydataset.mytable`
  WHERE _PARTITIONDATE > DATE_SUB(CURRENT_DATE(), INTERVAL 7 DAY)
)
SELECT
  *
FROM
  latest_partitions
WHERE
  date = (SELECT MAX(date) FROM latest_partitions)