Thanks! 2011/6/14 Darren Duncan <dar...@darrenduncan.net>
> Alpha Beta wrote: > >> Hi list, (newbie with databases) >> >> I was looking out in net about how can we determine or find all functional >> dependencies in a relational database, but didn't find. >> >> So can please anyone here tell me if functional dependecies for each table >> of a relational database can be found explicitly or >> we need algorithms for it or any other way? >> Best regards! >> > > Look for pairs of columns/attributes X and Y (or X may be a set of > columns/attrs) where, for every row/tuple having the same value for X, the > row/tuple always has the same value for Y. In this situation, for the data > you have at least, there would seem to be a relationship where X determines > Y and Y depends on X. Use an algorithm that does this looking for pairs. -- > Darren Duncan > >
