You can create a Macro that will delete each of your data tables.
Basically, you would use the "RunSQL" Action, with a command like this:
Code:
DELETE [TableName].* FROM [TableName];
You would need one of those actions for each table you have.
I would also recommend adding a "SetWarnings" action at the top set to "No", and one at the bottom set to "Yes". This would suppress all those warning about deleting the records in each table.
If you are not opposed to VBA, you could do all tables at once with VBA code, like the code shown here: http://stackoverflow.com/questions/6...tables-at-once