2014-04-10 22:42 GMT+03:00 Nik Tek <niktek2005@xxxxxxxxx>: > >Can anyone send me some pointers on it, to read about indexes on null columns. Richard Foote's oracle blog has plenty of info about indexes For indexing null values for example : http://richardfoote.wordpress.com/2008/01/23/indexing-nulls-empty-spaces/ http://richardfoote.wordpress.com/2008/01/30/how-are-nulls-actually-indexed-fascination/ and many more Gints
