Weaknesses of RDBMS

• Poor representation of real world entities

• Semantic overloading pp.858(809)

• poor support for integrity and enterprise constraints(model not, but SQL partially)

• Homogeneous data structure

• Limited operations

• Difficulty handling recursive queries

• Impedance mismatch (data type convertion)

• Transactions are generally short-lived

• Schema changes are difficult

• Content-based associative access (poor at navigational access)