...open.
Example:
SELECT 1
USE customer INDEX customer_name.ndx
@0,0 SAY name && Prints "Bob Dole"
SELECT 2
USE products INDEX products_name.ndx
@1,0 SAY name && Prints "Apples"
SELECT 1 && This goes back to the customer database.
@2,0 SAY name ** Prints "Bob Dole"