Staffer表(员工信息)内容如下ID* Name Age Dept1 Jack 25 IT2 Tom 26 IT3 Jessie 27 Sale4 Rose 26 Sale5 Steven 28 Market6 John 22 Market…Worktime表(一月30天全体员工上下班记录,假定30天均需考勤,如员工缺勤本表无相应
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