Bài tập SQL

Cau 1:

Create database QLSINHVIEN;

Create table SINHVIEN (

MASV varchar(15),

HOTEN nvarchar(15),

GIOITINH nvarchar(3),

QUEQUAN nvarchar(20));

Create table MONHOC (

MAMH varchar(15),

TENMH nvarchar(15),

SOTIET varchar(2));

Create table KHOA (

MAKHOA varchar(15),

TENKHOA nvarchar(15));

Create table DIEM (

MASV varchar(15),

MAMH varchar(15),

MAKHOA varchar(15),

DIEMTHI varchar(2));

Cau 2:

INSERT INTO SINHVIEN
VALUES (001, “Nguyén Van A”, 0, “Ha Nội”),
VALUES (002, “Nguyén Van B”, 0, “Thanh Hóa”),
VALUES (003, “Nguyén Thi C”, 1, “Nghé An”),
VALUES (004, “Nguyễn Thi D,” 1, “Ha Tinh”),
VALUES (005, “Nguyễn Thi E”, 1, “ Ninh Bình”);
INSERT INTO MONHOC

VALUES (010, “Ngôn ngữ SQL“ ,10),

VALUES (011, “ NCKH “,40),
VALUES (012, “Tiéng Anh“ ,10),
VALUES (013, “Dai s6“ , 10),
VALUES (014, “Cơ sở dữ liệu“ ,10);
INSERT INTO KHOA
VALUES (020, “CNTT“),
VALUES (021, “QTKD*),
VALUES (022, “ CTXH‘),
VALUES (023, “LUAT“),
VALUES (024, “GIOI“);
INSERT INTO DIEM (DIEMTHI)

VALUES (10),
VALUES (9),
VALUES (8),
VALUES (7),
VALUES (6);

Cau 3:
ALTER TABLE MONHOC
ADD LOAIMONHOC Nvarchar(50);

Cau 4:
UPDATE MONHOC

SET LOAIMONHOC = "Tu Chon”

WHERE SOTIET <20;

UPDATE MONHOC
SET LOAIMONHOC = "Bắt buộc”
WHERE SOTIET >=20;