HAS, a Relational Algebra Operator or Divide is not Enough to Conquer.

John V. Carlis HAS, a Relational Algebra Operator or Divide is not Enough to Conquer. 254-261 ICDE86/P254.pdf 1986 ICDE db/conf/icde/icde86.html#Carlis86 conf/icde/86 db/conf/icde/Carlis86.html journals/cacm/AstrahanC75 ... ... journals/cacm/Codd70 persons/Codd72 journals/jacm/Klug82 conf/jcdkb/Merrett78 ... ... journals/tods/StonebrakerWKH76