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Users questions:Several factories in an enterprise group, a variety of products produced by each factory, and each product can be produced in multiple plants, each plant produced according to a fixed number of products the plan, each plant employing more than workers, and each employee can only work in a factory, the factory employed wage workers are employed. Plant attributesPlant number, plant name, address, product attributes with product code, product name, size, number of workers of the attributes of workers, name. 1, according to the semantic draw ER diagram, need to indicate in the ER diagram entities, attributes, and entities associated type identifier. 2, the ER model into relational model, and pointed out thatRelationship model for each primary key and foreign key. 3, analysis of each relationship model has achieved the first of several models.
Experts answer: ER to answer this question well drawn map with WORD difficult to draw the ER diagram of the relationship with the model form first figure out a number of entities to do some further analysis should be simple
Experts answer: ER to answer this question well drawn map with WORD difficult to draw the ER diagram of the relationship with the model form first figure out a number of entities to do some further analysis should be simple
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