Subject Re: [firebird-support] Dividing one column by another
Author
There are no NULL values in either of the columns (that was my first thought). The table structure is 

TABLEA
URN: VARCHAR(12)
LINKURN: VARCHAR(12) [Links to TABLEB.ID]
AMOUNT: DOUBLE PRECISION

TABLEB
URN: VARCHAR(12)
VALUE: DOUBLE PRECISION

so the query is
SELECT A.AMOUNT, B.VALUE, A.AMOUNT/B.VALUE
FROM TABLE1 A
JOIN TABLE2 B ON A.LINKURN = B.URN