[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fd_UtrRJ_2cq2V8_xaX-aa3B_JgrZCISfegzFoSt7PO8":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":8,"question":15,"related":16,"source":20,"type":21},[],"2023-06-24 16:47:36",80135734,[],{"count":9,"courseId":10,"courseImg":11,"courseName":12,"workId":13,"workName":14},1,"828c56b800cb51737fac1ac008fe8565","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F2e4b8437b0ad9654210fb1d73f2fa644.png","数据库原理与应用","work_28054549","第5章 主观题1","设某商业集团数据库中有三个实体集.一是"商店"实体集,属性有商店编号、商店名、地址等;二是"商品"实体集,属性有商品号、商品名、规格、单价等;三是"职工"实体集,属性有职工编号、姓名、性别、业绩等. 商店与商品间存在"销售"联系,每个商店可销售多种商品,每种商品也可放在多个商店销售;每个商店销售的商品有月销售量;商店与职工间存在着"聘用"联系,每个商店有许多职工,每个职工只能在一个商店工作,商店聘用职工有聘期和月薪. (1) 试画出ER图,并在图上注明属性、联系的类型. (2)将ER图转换成关系模型,并注明主键和外键",[17],{"answer":18,"createTime":5,"id":6,"options":19,"question":15,"source":20,"type":21},[],[],"v1",6]