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CREATE DATABASE QLTGDTai
GO
USE QLTGDTai
GO

--1.Database GIAOVIEN
CREATE TABLE GIAOVIEN
(
	MAGV char(5) not null,
	HOTEN nvarchar(40) not null,
	LUONG float not null,
	PHAI nchar(3)
		CONSTRAINT CK_PHAI_NHANVIEN CHECK (PHAI IN('NAM',N'NỮ')) not null,
	NGSINH datetime not null,
	DIACHI nvarchar(100) not null,
	GVQLCM char(5) not null,
	MABM char(5) not null,

CONSTRAINT PK_GV
	PRIMARY KEY(MAGV)
)

--2.Database BOMON
CREATE TABLE BOMON
(
	MABM CHAR(5) not null,
	TENBM NVARCHAR(30) not null,
	PHONG CHAR(5) not null,
	DIENTHOAI CHAR(12) not null,
	TRUONGBM CHAR(5) not null,
	MAKHOA CHAR(5) not null,
	NGAYNHANCHUC DATETIME not null,

CONSTRAINT PK_BM
	PRIMARY KEY (MABM)
)

--3.Database KHOA
CREATE TABLE KHOA
(
	MAKHOA CHAR(5) not null,
	TENKHOA NVARCHAR(30) not null,
	NAMTL INT not null,
	PHONG CHAR(5) not null,
	DIENTHOAI CHAR(12) not null,
	TRUONGKHOA CHAR(5) not null,
	NGAYNHANCHUC DATETIME not null,

CONSTRAINT PK_K
	PRIMARY KEY (MAKHOA)
)

--Foreign key

/*ALTER TABLE [Tên Bảng]
ADD CONSTRAINT [Tên khóa ngoại]
FOREIGN KEY ([Danh sách các thuộc
tính khoá ngoại])
REFERENCES [Tên bảng tham chiếu] (
[Danh sách các thuộc tính khoá chính
của bảng tham chiếu tới])*/

--GIAOVIEN
ALTER TABLE GIAOVIEN
ADD CONSTRAINT FK_GV_GV FOREIGN KEY (GVQLCM) REFERENCES GIAOVIEN

ALTER TABLE GIAOVIEN 
ADD CONSTRAINT FK_GV_BM	FOREIGN KEY (MABM) REFERENCES BOMON

--KHOA
ALTER TABLE KHOA
ADD CONSTRAINT FK_K_GV FOREIGN KEY (TRUONGKHOA) REFERENCES GIAOVIEN

--BOMON
ALTER TABLE BOMON
ADD CONSTRAINT FK_BM_GV FOREIGN KEY (TRUONGBM) REFERENCES GIAOVIEN

ALTER TABLE BOMON
ADD	CONSTRAINT FK_BM_K 	FOREIGN KEY (MAKHOA) REFERENCES KHOA

--ALTER TABLE BOMON
--ADD CONSTRAINT FK_BM_GV FOREIGN KEY (MAGV) REFERENCES GIAOVIEN

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