Well first things first. Uncheck the Display Driver Status Panel in the QODBC setup.
And make sure that Detail Tracing in unchecked also!!
With the release of QODBC v6.00.00.155 we had to do a little more checking for deleted transactions and payments so tables that reference a open balance now run slower. Most users tend to use queries like:
SELECT * from Customer
which will run slowly as QODBC has to display the correct current open balance for each customer, while this will run much faster:
SELECT "Name","LastName","FirstName","BillAddressAddr1",
"BillAddressAddr2","BillAddressCity",
"BillAddressState","BillAddressPostalcode"
from Customer
However can also override your QODBC Optimizer configuration screen settings to suit what you are actually doing by using the following tags:
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. | 
