ER图 关系模型一个教员只讲授一门课程,一门课程可由多个教员教授,一个学生学习多门课程,每门课程有多个学生学习.请画ER
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ER图 关系模型
一个教员只讲授一门课程,一门课程可由多个教员教授,一个学生学习多门课程,每门课程有多个学生学习.请画ER图 并构造关系模型
教员:职工号,姓名,年龄,职称
学生:学好,姓名,年龄,性别
课程:课程号,课程名,学时数
PS:ER图我会画
一个教员只讲授一门课程,一门课程可由多个教员教授,一个学生学习多门课程,每门课程有多个学生学习.请画ER图 并构造关系模型
教员:职工号,姓名,年龄,职称
学生:学好,姓名,年龄,性别
课程:课程号,课程名,学时数
PS:ER图我会画
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Only an excellent quality colour, pure hand is enough to reflect your noble fashion taste,rosetta stone, simple dress up with visual focus,cheap oakleys, immediately yi yi is unripe brightness, this is where the magic deserve to design.
6, Chunky Sandal fashionable thick with sandals
The golden blonde cortical bare ankle high-heeled shoes perfectly counteracted spring a delicate and charming pink color, thick texture gives a person the sense of security, firm the original plain design simplicity and modern modern perfect union.
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7, Green environmental action is
Survival environment deteriorating, environmental protection consciousness to an all-time high today,rosetta stone english, we can do? Dressed in a BAZAAR fashion director basing Brana L.E.N.Y. brand design for the Wolf, with "for saving the earth and design" for the concept of environmental t-shirts, to show your environmental attitude!
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If you persist in grace, intellectual, sexy mainstream fashion style in leisure time, however,ray ban sunglasses, choose a delicate lively, compose full pendants, full of tong qu necklace enough to make people go back to childhood, of all kinds love sweet memory born by heart.
9 and Headbands Haute custom-made exclusive tire
With Gossip Girl "hit drama of global leap up is red, and actress Blair was like peas and carrots of of all kinds of hair become big heat october-december quarter sheet is tasted. Lovely girl style bowknot hair in this season of Givenchy hoop same prominence on T stage, rare material, classic bowknot let this paragraph style, slightly childish tire have become numerous fashion pioneer mind beloved,discount oakley sunglasses, let a person have to regrets senior customized charisma.
16, Glam Gems most spring Gems
Exaggerated crystal ornaments are always woman necessary in jewelry box, glittering and translucent light, natural pure color, is to upgrade the perfect single product simple dress!
Topics related articles:
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herve leger Plaid abstract exotic
ER图 关系模型一个教员只讲授一门课程,一门课程可由多个教员教授,一个学生学习多门课程,每门课程有多个学生学习.请画ER
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