《数据库原理及应用》(Introduction to Database Systems) 一、关系代数(共15分，每小题3分) 设有供应商-零件-工程数据库模式如下： 供应商表S(sNo,sName, sCity, sTel) 零件表P(pNo, pName, pColor, pOrigin) 工程项目表J(jNo, jName, jCity) 供应情况表SPJ(sNo, jNo, pNo, Qty) 给出得到如下结果的关系代数表达式：…
Microsoft Word – NittanyPath-v1.docx SP2020 CMPSC431W Database Management Systems Instructor: Wang-Chien Lee NittanyPath NittanyPath is a startup project which aims to help Nittany State University…
University of Toronto csc343, Winter 2020 Assignment 2 Due: Friday, March 6, before 4pm Learning Goals By the end of this assignment you will be…