'Natural join operation' diaporamas de présentation

Foundations of Database Systems

Foundations of Database Systems. Relational Algebra Instructor: Zhijun Wang. Announcement. Project A sample format is available online Lab#1 will be given on next Saturday and Wednesday . Group 1: M409 Saturday 13:00-16:00 (Feb 23) Group 2:M402

664 views • 50 slides

??? ????? oracle ???????

??? ????? oracle ???????. 3.1 ?????????. 3.2 ????. 3.3 oracle ?????????. ????????????????????? 1970 ??? IBM ???????? Dr.E.F.Codd ?????????????????????????? Dr.E.F.Codd proposed the relational model for database systems in 1970s.

527 views • 34 slides

LAB 4

445 views • 33 slides

Chapter 3: Relational Model III

Chapter 3: Relational Model III. Additional Relational Algebra Operations Views. Additional Operations. We define additional operations that do not add any power to the relational algebra, but that simplify common queries. Set intersection Natural join Division Assignment.

449 views • 31 slides

Session 3

180 views • 18 slides