Question

I’m trying to copy a table named “CLOUD” to a new one named “t1_temp” while grouping the rows based on a column named “tag”. BUT i want this to happen only if the “NeighborhoodID” column is the same.

The query i’m running is:

INSERT INTO t1_temp (id, NeighborhoodID, power, tag) 
        SELECT id, NeighborhoodID, SUM(power), tag 
        FROM CLOUD GROUP BY tag ORDER BY NeighborhoodID

So for example:

The third entry shouldn’t be grouped with the 1th & 4th entry’s because the “NeighborhoodID” isn’t the same.

I hope i’m clear, if not please comment, thanks.

Answer 1

You can group by multiple columns, so:

INSERT INTO t1_temp (id, NeighborhoodID, power, tag) 
    SELECT id, NeighborhoodID, SUM(power), tag 
    FROM CLOUD GROUP BY tag, NeighborhoodID ORDER BY NeighborhoodID