help with db selection with php .............

ok guyz i need some inside info ..... plz help me with: 1. if i ve to conver a db in foxpro to mysql or sql which one should i preffer to use with php and y ???? 2. and while im converting the foxpro db to mysql what will i ve to loose ???? the common pitfalls ...... 3. there aint no foreign keys in mysql then what can i do about cascading updates, deletes and all 5. n finally do i have anyother choice of open source database (cheapest if not completely free) for this conversion ????? id be eternally gratefull if anyone cud guide me thru this ...... thnx a billion zillion guyz ..... toby ...... __________________________________________________ Do You Yahoo!? Everything you'll ever need on one web page from News and Sport to Email and Music Charts http://uk.my.yahoo.com