Hi koolguy,
I would do it in 2 queries:
1. Find the first record for each customer - qryFindFirst:
SELECT Table1.id, First(Table1.date) AS FirstOfdate
FROM Table1;
2. Subtract the query above from your table (Table1):
SELECT Table1.id, Table1.date, qryFindFirst.FirstOfdate
FROM Table1 LEFT...