Mathematica can export tables of numerical and textual data to all common database file formats. It can also import from database formats to give
Mathematica arrays and metadata in various forms.
"MDB" — Microsoft Access database file (.mdb)
"DBF" — dBase database file (.dbf)
"DIF" — VisiCalc data interchange format (.dif)
"XLSX" — Excel 2007 format (.xlsx)
"Rules" — rules for all elements
"Elements" — all available elements