You can override your QODBC Optimizer configuration screen settings to suit what you are actually doing by using the following tags after the table name:
VERIFIED | VERIFY - Forces Full Resync with QuickBooks on the optimized table before Query starts
CALLDIRECT | UNOPTIMIZED - Passthru query directly to QuickBooks - use no optimizations
OPTIMIZE | OPTIMIZED | NOSYNC - Passthru query to optimized table directly for maximum speed
Examples:
select * from InvoiceLine UNOPTIMIZED
select * from InvoiceLine NOSYNC
select * from InvoiceLine VERIFIED
To read all the InvoiceLines directly out of QuickBooks use:
select * from InvoiceLine UNOPTIMIZED
Or you can resync your optimized InvoiceLine table by first doing:
sp_optimizefullsync InvoiceLine
then read directly out of the optimized table by doing:
select * from InvoiceLine NOSYNC
This is very f...a.......s.................t.
Another good example of using NOSYNC would be to get for example all invoicelines before 2003:
SELECT * from InvoiceLine NOSYNC WHERE Txndate < {d '2004-01-01'}
as invocies before 2004 don't ever change, you can read them directly from the QODBC Optimizer. You just need to use unoptimized for crtical operations like Sales Commisions etc.
See: How do I create a Pass-Through Report using Microsoft Access 2003? for more. | 
