mysql - multiplying two columns, displaying as new column in select statement sql -


trying take values 2 columns, multiply them, , display result new column in, in select statement. below got far

select m.item_name, m.price, sum(od.qty) count menu m, order_detail od, sum(m.price * od.qty) tsales m.menuid = od.menuid group m.item_name order count desc limit 10;

i can select statement show new column new values. without last part of select statement this:

select statement result without column error message

i think looking result returned statement this:

  select m.item_name        , sum(m.price*od.qty) tot_price_times_qty     menu m     join order_detail od       on od.menuid = m.menuid    group m.item_name    order tot_price_times_qty desc    limit 10

but, without sample data or demonstration of expected output, that's guess.


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