Error: near "FROM": syntax error - SQL code

Question

dt1_a <- sqldf("

SELECT Brand, Year,
sum(SalesQuantity) AS sumQSales,
avg(SalesPrice) AS avgPrice
FROM tSales GROUP BY Brand

")

str(dt1_a)

Answer 1

My guess given just the query is that you are not grouping enough variables.

When you have aggregating functions in your query ( sum and avg in this case), all other variables may need to be included in the group by query. (@G.Grothendieck advised that it is not always necessary. Since I've never been able to get it to work without, I must have stopped trying before finding the exception. Thanks!)

Try this:

dt1_a <- sqldf("

SELECT Brand, Year,
sum(SalesQuantity) AS sumQSales,
avg(SalesPrice) AS avgPrice
FROM tSales GROUP BY Brand, Year

")