分类导航
1-7 1-2 7-9 1-6 2-7 2-3 5-9 3-6 4-7 3-4 1-3 3-8 5-7 4-5 2-5 5-8 7-8 5-6 2-6 8-9 (2)据上表编制A主关系簇和X关系簇,如下图: 61-8 4-6 3-9 6-9 4-9 1 6 2 2 5 4 7 9 8 1 A主关系簇 3 4 5 9 8 X关系簇 3 3 6 2 5 4 7 9 8 1 3 (3)安置所以部门如右图 3.一产品...