my question is ,,
how to build a diagram, I don't understand that many to many , or one to many and about primary key and foreign key and etc..
here is my code. is about a hospital where i have ,
NURSES, WARD, PATIENTS, DOCTORS.
CREATE TABLE Nurses(
`idNurses` INT NOT NULL AUTO_INCREMENT,
`Fname` VARCHAR(45) NULL,
`Lname` VARCHAR(45) NULL,
`Speciality` VARCHAR(45) NULL,
PRIMARY KEY (`idNurses`))
ENGINE = InnoDB;
CREATE TABLE Doctors (
`idDoctors` INT NOT NULL AUTO_INCREMENT,
`Fname` VARCHAR(45) NULL,
`Lname` VARCHAR(45) NULL,
`Speciality` VARCHAR(45) NULL,
PRIMARY KEY (`idDoctors`))
ENGINE = InnoDB;
CREATE TABLE Ward(
`idWard` INT NOT NULL AUTO_INCREMENT,
`Name` VARCHAR(45) NULL,
`Location` VARCHAR(45) NULL,
`Nurses_idNurses` INT NOT NULL,
`Doctors_idDoctors` INT NOT NULL,
PRIMARY KEY (`idWard`, `Nurses_idNurses`, `Doctors_idDoctors`),
INDEX `fk_Ward_Nurses_idx` (`Nurses_idNurses` ASC),
INDEX `fk_Ward_Doctors1_idx` (`Doctors_idDoctors` ASC),
CONSTRAINT `fk_Ward_Nurses`
FOREIGN KEY (`Nurses_idNurses`)
REFERENCES `mydb`.`Nurses` (`idNurses`)
ON DELETE NO ACTION
ON UPDATE NO ACTION,
CONSTRAINT `fk_Ward_Doctors1`
FOREIGN KEY (`Doctors_idDoctors`)
REFERENCES `mydb`.`Doctors` (`idDoctors`)
ON DELETE NO ACTION
ON UPDATE NO ACTION)
ENGINE = InnoDB;
CREATE TABLE Patient (
`idPatient` INT NOT NULL AUTO_INCREMENT,
`Fname` VARCHAR(45) NULL,
`Lname` VARCHAR(45) NULL,
`DOB` DATE NULL,
`Phone_number` INT NULL,
`Ward_idWard` INT NOT NULL,
`Ward_Nurses_idNurses` INT NOT NULL,
`Ward_Doctors_idDoctors` INT NOT NULL,
PRIMARY KEY (`idPatient`, `Ward_idWard`, `Ward_Nurses_idNurses`, `Ward_Doctors_idDoctors`),
INDEX `fk_Patient_Ward1_idx` (`Ward_idWard` ASC, `Ward_Nurses_idNurses` ASC, `Ward_Doctors_idDoctors` ASC),
CONSTRAINT `fk_Patient_Ward1`
FOREIGN KEY (`Ward_idWard` , `Ward_Nurses_idNurses` , `Ward_Doctors_idDoctors`)
REFERENCES `mydb`.`Ward` (`idWard` , `Nurses_idNurses` , `Doctors_idDoctors`)
ON DELETE NO ACTION
ON UPDATE NO ACTION)
ENGINE = InnoDB;
how to build a diagram, I don't understand that many to many , or one to many and about primary key and foreign key and etc..
here is my code. is about a hospital where i have ,
NURSES, WARD, PATIENTS, DOCTORS.
CREATE TABLE Nurses(
`idNurses` INT NOT NULL AUTO_INCREMENT,
`Fname` VARCHAR(45) NULL,
`Lname` VARCHAR(45) NULL,
`Speciality` VARCHAR(45) NULL,
PRIMARY KEY (`idNurses`))
ENGINE = InnoDB;
CREATE TABLE Doctors (
`idDoctors` INT NOT NULL AUTO_INCREMENT,
`Fname` VARCHAR(45) NULL,
`Lname` VARCHAR(45) NULL,
`Speciality` VARCHAR(45) NULL,
PRIMARY KEY (`idDoctors`))
ENGINE = InnoDB;
CREATE TABLE Ward(
`idWard` INT NOT NULL AUTO_INCREMENT,
`Name` VARCHAR(45) NULL,
`Location` VARCHAR(45) NULL,
`Nurses_idNurses` INT NOT NULL,
`Doctors_idDoctors` INT NOT NULL,
PRIMARY KEY (`idWard`, `Nurses_idNurses`, `Doctors_idDoctors`),
INDEX `fk_Ward_Nurses_idx` (`Nurses_idNurses` ASC),
INDEX `fk_Ward_Doctors1_idx` (`Doctors_idDoctors` ASC),
CONSTRAINT `fk_Ward_Nurses`
FOREIGN KEY (`Nurses_idNurses`)
REFERENCES `mydb`.`Nurses` (`idNurses`)
ON DELETE NO ACTION
ON UPDATE NO ACTION,
CONSTRAINT `fk_Ward_Doctors1`
FOREIGN KEY (`Doctors_idDoctors`)
REFERENCES `mydb`.`Doctors` (`idDoctors`)
ON DELETE NO ACTION
ON UPDATE NO ACTION)
ENGINE = InnoDB;
CREATE TABLE Patient (
`idPatient` INT NOT NULL AUTO_INCREMENT,
`Fname` VARCHAR(45) NULL,
`Lname` VARCHAR(45) NULL,
`DOB` DATE NULL,
`Phone_number` INT NULL,
`Ward_idWard` INT NOT NULL,
`Ward_Nurses_idNurses` INT NOT NULL,
`Ward_Doctors_idDoctors` INT NOT NULL,
PRIMARY KEY (`idPatient`, `Ward_idWard`, `Ward_Nurses_idNurses`, `Ward_Doctors_idDoctors`),
INDEX `fk_Patient_Ward1_idx` (`Ward_idWard` ASC, `Ward_Nurses_idNurses` ASC, `Ward_Doctors_idDoctors` ASC),
CONSTRAINT `fk_Patient_Ward1`
FOREIGN KEY (`Ward_idWard` , `Ward_Nurses_idNurses` , `Ward_Doctors_idDoctors`)
REFERENCES `mydb`.`Ward` (`idWard` , `Nurses_idNurses` , `Doctors_idDoctors`)
ON DELETE NO ACTION
ON UPDATE NO ACTION)
ENGINE = InnoDB;