Conference paper
Quest: a project on database mining
R. Agrawal, M. Carey, et al.
SIGMOD 1994
The problem is discussed of defining numerical operations on a relational database to accommodate the statistical analyses associated with a bivariate frequency table. An attempt has been made to extend Codd's relational algebra to include simple bivariate statistical operations preserving the closure of Codd's algebra. This extended algebra is applied to bivariate relational data structures needed for real-time automatic statistical quality control of a manufacturing process. Also discussed are some new category-numeric operations on relational tables.
R. Agrawal, M. Carey, et al.
SIGMOD 1994
M.M. Astrahan, S.P. Ghosh
SIGFIDET 1974
S.P. Ghosh, M.E. Senko
Journal of the ACM
C.T. Abraham, S.P. Ghosh, et al.
Information and Control