Another in the series of recordings I have done for INETA Live.
Abstract:
Relational divison was one of Dr. Codd's original 8 operators and it is very useful. There is Codd's Division, Todd's Division, exact division. These are easy to write with Standard SQL-92. But now we have sequenced clusters whcih are st done with the new ordinal functions.
Bio:
Joe Celko served 10 years on ANSI/ISO SQL Standards Committee and is author of eight books on SQL for Morgan-Kaufmann: SQL FOR SMARTIES (1995, second edition 1999, third edition 2005), SQL PUZZLES & ANSWERS (1997), DATA & DATABASES (1999) and TREES & HIERARCHIES IN SQL (2004), SQL PROGRAMMING STYLE (2005) and ANALYTICS & OL