USE LanguageCenter; CREATE TABLE Student $($ student$\_$id INT PRIMARY KEY AUTO$\_$INCREMENT, first$\_$name VARCHAR$(20),$ last$\_$name VARCHAR$(20),$ date$\_$of$\_$birth DATE, contact$\_$number VARCHAR$(15),$ email VARCHAR$(100),$ address VARCHAR$(255),$ registration$\_$date DATE NOT NULL $)$; CREATE TABLE Teacher $($ teacher$\_$id INT PRIMARY KEY AUTO$\_$INCREMENT, first$\_$name VARCHAR$(20),$ last$\_$name VARCHAR$(20),$ contact$\_$number VARCHAR$(15),$ email VARCHAR$(100),$ hire$\_$date DATE, salary DECIMAL$(10,2))$; CREATE TABLE Course $($ course$\_$id INT PRIMARY KEY AUTO$\_$INCREMENT, course$\_$name VARCHAR$(100),$ language VARCHAR$(50),$ level ENUM$(\text{'}$Beginner$\text{'},$ 'Intermediate', 'Advanced'$),$ course$\_$fee DECIMAL$(10,2)$ CHECK $($course$\_$fee $>0),$ duration$\_$weeks INT $)$; CREATE TABLE Class $($ class$\_$id INT PRIMARY KEY AUTO$\_$INCREMENT, class$\_$name VARCHAR$(50),$ room$\_$number VARCHAR$(10),$ start$\_$time TIME, end$\_$time TIME $)$; CREATE TABLE Enrollment $($ enrollment$\_$id INT PRIMARY KEY AUTO$\_$INCREMENT, student$\_$id INT, course$\_$id INT, enrollment$\_$date DATE, progress$\_$status ENUM$(\text{'}$Not Started', $\text{'}$In Progress', 'Completed'$),$ FOREIGN KEY $($student$\_$id$)$ REFERENCES Student$($student$\_$id$),$ FOREIGN KEY $($course$\_$id$)$ REFERENCES Course$($course$\_$id$))$; CREATE TABLE Payment $($ payment$\_$id INT PRIMARY KEY AUTO$\_$INCREMENT, student$\_$id INT, payment$\_$date DATE, amount DECIMAL$(10,2),$ payment$\_$method ENUM$(\text{'}$Credit Card', 'Cash', 'Bank Transfer'$),$ FOREIGN KEY $($student$\_$id$)$ REFERENCES Student$($student$\_$id$))$; DELIMITER $$ CREATE TRIGGER validate$\_$payment$\_$date BEFORE INSERT ON Payment FOR EACH ROW BEGIN $--$ Check if the payment$\_$date is in the future IF NEW.payment$\_$date $>$ CURDATE$()$ THEN SIGNAL SQLSTATE $\text{'}45000\text{'}$ SET MESSAGE$\_$TEXT $=$ 'Payment date cannot be in the future'; END IF; END$$ DELIMITER ; CREATE TABLE Schedule $($ schedule$\_$id INT PRIMARY KEY AUTO$\_$INCREMENT, class$\_$id INT, teacher$\_$id INT, day$\_$of$\_$week ENUM$(\text{'}$Monday$\text{'},$ 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday', 'Sunday'$),$ start$\_$time TIME, end$\_$time TIME, FOREIGN KEY $($class$\_$id$)$ REFERENCES Class$($class$\_$id$),$ FOREIGN KEY $($teacher$\_$id$)$ REFERENCES Teacher$($teacher$\_$id$))$; CREATE TABLE Attendance $($ attendance$\_$id INT PRIMARY KEY AUTO$\_$INCREMENT, student$\_$id INT, class$\_$id INT, attendance$\_$date DATE, attendance$\_$status ENUM$(\text{'}$Present$\text{'},$ 'Absent'$),$ FOREIGN KEY $($student$\_$id$)$ REFERENCES Student$($student$\_$id$),$ FOREIGN KEY $($class$\_$id$)$ REFERENCES Class$($class$\_$id$))$; CREATE TABLE Feedback $($ feedback$\_$id INT PRIMARY KEY AUTO$\_$INCREMENT, student$\_$id INT, course$\_$id INT, feedback$\_$date DATE, rating INT CHECK $($rating BETWEEN $1$ AND $5),$ comments TEXT, FOREIGN KEY $($student$\_$id$)$ REFERENCES Student$($student$\_$id$),$ FOREIGN KEY $($course$\_$id$)$ REFERENCES Course$($course$\_$id$))$; CREATE TABLE Admin $($ admin$\_$id INT PRIMARY KEY AUTO$\_$INCREMENT, first$\_$name VARCHAR$(50),$ last$\_$name VARCHAR$(50),$ contact$\_$number VARCHAR$(15),$ email VARCHAR$(100),$ role VARCHAR$(50))$; CREATE ROLE 'StudentRole'; CREATE ROLE 'TeacherRole'; $--$ Grant read$-$write access to students for their own details GRANT SELECT, UPDATE ON Student TO 'StudentRole'; GRANT SELECT ON Course TO 'StudentRole'; GRANT SELECT ON Enrollment TO 'StudentRole'; GRANT INSERT, UPDATE ON Feedback TO 'StudentRole'; $--$ Grant read$-$write access to teachers for attendance marking GRANT SELECT, UPDATE ON Teacher TO 'TeacherRole'; GRANT SELECT ON Class TO 'TeacherRole'; GRANT SELECT, UPDATE ON Attendance TO 'TeacherRole'; $-$To create an ER diagram to this SQL code with all relations and attributes