在 BigQuery 中，如何汇总匹配相同日期和 ID 的字段？

Question

I have some data in BigQuery that is 3 columns: date, id, quantity. Example:

2021-2-2 | abcd | 123
2021-2-2 | abcd | 456
2021-2-1 | efgh | 321
2021-2-1 | efgh | 654

I'd like to combine and total where the dates and ids match like so:

2021-2-2 | abcd | 579
2021-2-1 | efgh | 975

I think the best way to go about this would be to put all of the new data into a new BigQuery table, then delete the old. How would I go about running the query and writing to a new table for a large data set using a Node Cloud Function?

Answer 1

If I understand correctly, you just want group by :

select date, id, sum(quantity)
from t
group by date, id;

If this answers your question, you should make some effort to learn SQL -- there are many tutorials, books, and online resources that can help. GROUP BY is very basic SQL and some background in the language will help you use BigQuery.