Cost database cost cause, such as software used in database management system, personnel cost
in practice. And hardware etc.
2.There are complex, started using the database system. May cause complications, such as data storage, data base design, programming, etc.
3.The risk of disruption of the system. Because data is stored in the center (Centralized Database System) failure of working parts in the system may cause the whole database system halted
.
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