E-R图
2018-11-25 16:32:28 145 举报Sales模式的S-R图
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大纲/内容
linenumberpartkeysuppkeyquantityextendedpricediscounttaxreturnflag
custkeynameaddressphonenationcomment
regionkeynamecomment
Purchase
Belong to
nationkeynameregionkeycomment
Nation
Region
Customer
included
suppkeynameaddressnationkeycomment
Order
Lineitem
partkeynamemfgrbrandtypesizeretailpricecontainercomment
Supplier
orderkeystatustotalpriceorderdateorderpriorityclerkshipprioritycomment
PartSupp
Part
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