A Note on the Relational Calculus.

@article{DBLP:journals/sigmod/Date89,
  author    = {C. J. Date},
  title     = {A Note on the Relational Calculus},
  journal   = {SIGMOD Record},
  volume    = {18},
  number    = {4},
  year      = {1989},
  pages     = {12-16},
  ee        = {http://doi.acm.org/10.1145/74120.74122, db/journals/sigmod/Date89.html},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}

ACM SIGMOD Anthology

• Windows: Click the letter of your CD drive
  A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
• Mac: Click here
• UNIX/LINUX: mount the CD and click on the path of your mount point:
  /Anthology/An4-2 or /cdrom

• Windows: Click the letter of your CD drive
  A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
• Mac: Click here
• UNIX/LINUX: mount the DVD and click on the path of your mount point:
  /Anthology/aDVD2 or /dvd

Online Edition