Danger of a Overkill: For small and simple applications for single users a database system is often not advisable.
Complexity: A database system creates additional complexity and requirements. The supply and operation of a database management system with several users and databases is quite costly and demanding.
Qualified Personnel: The professional operation of a database system requires appropriately trained staff. Without a qualified database administrator nothing will work for long.
Costs: Through the use of a database system new costs are generated for the system itselfs but also for additional hardware and the more complex handling of the system.
Lower Efficiency: A database system is a multi-use software which is often less efficient than specialised software which is produced and optimised exactly for one problem.
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