PRAGMA foreign_keys = ON;

PRAGMA writable_schema = 1;
DELETE FROM sqlite_master WHERE type IN ("table", "index", "trigger");
PRAGMA writable_schema = 0;
VACUUM;

CREATE TABLE "course" (
"Course_ID" INT UNIQUE,
"Staring_Date" TEXT,
"Course" TEXT,
PRIMARY KEY ("Course_ID")
);

CREATE TABLE "course_arrange" (
"Course_ID" INT,
"Teacher_ID" INT,
"Grade" INT,
PRIMARY KEY ("Course_ID", "Teacher_ID", "Grade"),
FOREIGN KEY ("Teacher_ID") REFERENCES "teacher"("Teacher_ID"),
FOREIGN KEY ("Course_ID") REFERENCES "course"("Course_ID")
);

CREATE TABLE "teacher" (
"Teacher_ID" INT UNIQUE,
"Name" TEXT,
"Hometown" TEXT,
PRIMARY KEY ("Teacher_ID")
);





INSERT INTO "course" VALUES ("1", "2023-09-01", "Introduction to SQL");
INSERT INTO "course" VALUES ("2", "2023-10-15", "Advanced Database Design");
INSERT INTO "course" VALUES ("3", "2023-11-01", "Data Structures and Algorithms");
INSERT INTO "course" VALUES ("4", "2024-01-10", "Web Development Fundamentals");
INSERT INTO "course" VALUES ("5", "2024-02-20", "Machine Learning Basics");
INSERT INTO "course" VALUES ("6", "2023-09-15", "Python Programming");
INSERT INTO "course" VALUES ("7", "2023-10-01", "Cloud Computing");
INSERT INTO "course" VALUES ("8", "2024-03-01", "Cybersecurity Essentials");
INSERT INTO "teacher" VALUES ("101", "Alice Smith", "New York");
INSERT INTO "teacher" VALUES ("102", "Bob Johnson", "Los Angeles");
INSERT INTO "teacher" VALUES ("103", "Charlie Brown", "Chicago");
INSERT INTO "teacher" VALUES ("104", "Diana Prince", "Washington D.C.");
INSERT INTO "teacher" VALUES ("105", "Eve Adams", "Boston");
INSERT INTO "teacher" VALUES ("106", "Frank White", "Houston");
INSERT INTO "teacher" VALUES ("107", "Grace Lee", "San Francisco");
INSERT INTO "course_arrange" VALUES ("1", "101", "95");
INSERT INTO "course_arrange" VALUES ("2", "102", "88");
INSERT INTO "course_arrange" VALUES ("3", "103", "92");
INSERT INTO "course_arrange" VALUES ("4", "104", "85");
INSERT INTO "course_arrange" VALUES ("5", "105", "90");
INSERT INTO "course_arrange" VALUES ("1", "106", "80");
INSERT INTO "course_arrange" VALUES ("6", "101", "91");
INSERT INTO "course_arrange" VALUES ("7", "102", "87");
INSERT INTO "course_arrange" VALUES ("8", "103", "93");
INSERT INTO "course_arrange" VALUES ("2", "101", "89");
INSERT INTO "course_arrange" VALUES ("3", "104", "86");
INSERT INTO "course_arrange" VALUES ("4", "105", "94");
INSERT INTO "course_arrange" VALUES ("5", "106", "82");
INSERT INTO "course_arrange" VALUES ("6", "107", "90");
INSERT INTO "course_arrange" VALUES ("7", "107", "85");