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Ví dụ 1: Chuyển mô hình quan niệm về dữ liệu sang mô hình tổ chức dữ liệu
của HTTT "Quản lý kho hàng"
Từ mô hình trên các quan hệ nhận được là
Nhà CC (Mã NCC, Tên NCC, Đchỉ NCC)
Kho (Tên kho, Đchỉ kho)
Khhàng (Mã khách, Tên khách, Đchỉ khách)
Phiếu nhập (Số phiếu_N, Ngày nhập, Mã NCC)
Phiếu xuất (Sốphiếu_X, Ngày xuất, Mãkhách)
Hàng (Mãhàng, Tênhàng, Đơnvị, Đơngiá, Tên kho)
Gồm hàng_N (Sốphiếu_N, Mãhàng, SL_nhập)
Gồm hàng_X (Sốphiếu_X, Mãhàng, SL_xuất)
Chứa (Tồnkho, Tênkho, Mãhàng)
Gồm hàng_X
SL_xuất
Gồm hàng_N
SL nhập
PH XUẤT
Số phiếu_X
Ngàyxuất
Khhàng
Mãkhách
Tên khách
Đchỉ khách
Hàng
Mã hàng
Tên hàng
Đơn vị
Đơn giá
Phiếu nhập
Số phiếu N
Ngày nhập
Nhà CC
Mã NCC
Tên NCC
Đchỉ NCC
Kho
Tên kho
Đch ỉkho
Nhập từ
(1,n) (1,n) (1,n)
(1,1)
(1,1)(1,1)
(1,n) (1,n) (0,n) (1,n)
Mô hình thực thể -mối quan hệ của bài toán "QL Kho hàng"
Chứa
Tồn kho
Xuất cho

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Ví dụ 1

  • 1. Ví dụ 1: Chuyển mô hình quan niệm về dữ liệu sang mô hình tổ chức dữ liệu của HTTT "Quản lý kho hàng" Từ mô hình trên các quan hệ nhận được là Nhà CC (Mã NCC, Tên NCC, Đchỉ NCC) Kho (Tên kho, Đchỉ kho) Khhàng (Mã khách, Tên khách, Đchỉ khách) Phiếu nhập (Số phiếu_N, Ngày nhập, Mã NCC) Phiếu xuất (Sốphiếu_X, Ngày xuất, Mãkhách) Hàng (Mãhàng, Tênhàng, Đơnvị, Đơngiá, Tên kho) Gồm hàng_N (Sốphiếu_N, Mãhàng, SL_nhập) Gồm hàng_X (Sốphiếu_X, Mãhàng, SL_xuất) Chứa (Tồnkho, Tênkho, Mãhàng) Gồm hàng_X SL_xuất Gồm hàng_N SL nhập PH XUẤT Số phiếu_X Ngàyxuất Khhàng Mãkhách Tên khách Đchỉ khách Hàng Mã hàng Tên hàng Đơn vị Đơn giá Phiếu nhập Số phiếu N Ngày nhập Nhà CC Mã NCC Tên NCC Đchỉ NCC Kho Tên kho Đch ỉkho Nhập từ (1,n) (1,n) (1,n) (1,1) (1,1)(1,1) (1,n) (1,n) (0,n) (1,n) Mô hình thực thể -mối quan hệ của bài toán "QL Kho hàng" Chứa Tồn kho Xuất cho