Don't glue the top on - this is bound to fail probably sooner than later.
The movement of the top from expansion/contraction will cause it to fail -
if normal use doesn't.

Use finger blocks or table-top clips (Rockler, Woodcraft, home-made) to
attach the top to the skirt of the table. If you have already assembled the
lower part of the table, you can still cut the finger-slots with a jointer
or a biscuit cutter. This type of attachment provides a very secure
attachment that will allow natural movement.