AWS Athena CAST with GROUP BY

Question

I have a table in Athena AWS with a timestamp field. I want to group them by date. My SQL query is:

SELECT CAST(createdat AS DATE) FROM conversations GROUP BY createdat But my result is the following:

As you can see the group by does not work, and the reason is that the new table has the name field _col0 instead createdat . I also tried: SELECT CAST(createdat AS DATE) FROM conversations GROUP BY _col0 but I got and error.

Does anybody has any suggestions? I will appreciate it

Answer 1

Try using then same in group by

SELECT CAST(createdat AS DATE) 
FROM conversations 
GROUP BY CAST(createdat AS DATE)

Answer 2

Same but a little shorter

SELECT CAST(createdat AS DATE) 
FROM conversations 
GROUP BY 1;