If you want to achieve a multiple-choice, and I have also included in cxDBchecklistbox cxDBchecklistbox hierarchy how to realize the operation of the database

Such as: the university (university of college Chinese university mathematics English) high school primary school are checked (brackets can multi-select)

In the database field for record of formal schooling and subject

Multiple databases in 1, 2, 3 good or have other way for your guidance