Anyone know if Joe's query

SELECT (C2.julian_business_nbr - C1.julian_business_nbr)

FROM Calendar AS C1, Calendar AS C2

WHERE C1.cal_date = '2007-04-05',

AND C2.cal_date = '2007-04-10';

causes a cross join before the complete WHERE clause is applied ?

Or are we just cross joining the 2 rows that would be the answer sets of 2 discreet queries, each using one of the phrases of the where clause?