How to fetch data for a specific time period in BigQuery

Question

Please, I created my table using hour time partition. Please, I would like would like to fetch data that was stored in my table in the last X minutes, eg last 5 minutes.

I tried using this command SELECT * FROM mydataset.mytable FOR SYSTEM_TIME AS OF TIMESTAMP_SUB(CURRENT_TIMESTAMP(), INTERVAL 5 MINUTE);

But, it returns a lot more rows than what is expected. I typically store 500 rows every 2 minutes, but this query is returning more than 30000 rows

Answer 1

As @Samuel mentioned in the comment, below example query can be considered to fetch data for a specific time period in BigQuery.

Select * from `dataset.table` 
WHERE col_timestamp < TIMESTAMP_SUB(CURRENT_TIMESTAMP(), 
INTERVAL 5 MINUTE)

Posting the answer as community wiki for the benefit of the community that might encounter this use case in the future.

Feel free to edit this answer for additional information.