... protection of statistical databases These include McLeish (1 989 ), Chin and Ozsoyoglu (1 981 ), Leiss (1 982 ), Wong (1 984 ), and Denning (1 980 ) Ghosh (1 984 ) discusses the use of statistical databases ... different types of distributed database systems, including federated and multidatabase systems and highlights the problems of heterogeneity and the needs of autonomy in federated database systems, which ... On 19 98- 07-30, 08: 31:00, the salary of Smith was corrected to show that it should have been entered as 31000 (instead of 30000 as shown), effective on 19 98- 06-01 On 1999-03- 18, 08: 31:00, the database...