SQLize | PHPize | SQLtest

-- Step 1: Create students table CREATE TABLE students ( roll_no INT PRIMARY KEY, name VARCHAR(50), marks INT ); -- Step 2: Insert sample data INSERT INTO students VALUES (1, 'Arun', 92), (2, 'Priya', 76), (3, 'Rahul', 63), (4, 'Sneha', 49), (5, 'Karthik', 85); -- Step 3: Change delimiter for function DELIMITER $$ -- Step 4: Create get_grade() function CREATE FUNCTION get_grade(score INT) RETURNS VARCHAR(2) DETERMINISTIC BEGIN DECLARE grade VARCHAR(2); IF score >= 90 THEN SET grade = 'A'; ELSEIF score >= 75 THEN SET grade = 'B'; ELSEIF score >= 60 THEN SET grade = 'C'; ELSEIF score >= 50 THEN SET grade = 'D'; ELSE SET grade = 'F'; END IF; RETURN grade; END$$ -- Step 5: Reset delimiter DELIMITER ; -- Step 6: Create student_grades table CREATE TABLE student_grades ( roll_no INT PRIMARY KEY, grade VARCHAR(2) ); -- Step 7: Insert grades using function INSERT INTO student_grades (roll_no, grade) SELECT roll_no, get_grade(marks) FROM students; -- Step 8: View final result SELECT s.name, s.marks, g.grade FROM students s JOIN student_grades g ON s.roll_no = g.roll_no;