Description: A group has several factories, each plant produces a variety of products, and each product can be produced in a factory, the factory in accordance with each fixed quantity in the production plan, plan the number of not less than 300; each facility employs several employees, and each employee can only work in a factory, the factory workers employment duration of employment and wages. The attributes of the factory include the plant number, factory name and address. The attributes of the product include product number, product name and specification. The attributes of the staff include worker number, name and technical level (primary, intermediate, advanced).
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SQLQuery1.sql
实验1.docx
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