(1) The definition of customer Table customer, vendor table supplier, Information Table commodity goods, orders information table order, creditgrade credibility scales and the type of commodity goodstype table of the main keys. (2) definition of the above table outside the key constraint. (3) defines the only constraint : the customer table loginname field; supplier table loginname field and suppliername field; creditgrade table creditgradename field; goodstype table goodstypename field.

Packet : 43680526实验3 设计数据完整性.rar filelist
实验3 设计数据完整性.doc

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