這邊是建立資料表的SQL語法，會創建

1. 顧客表
2. 菜單表
3. 預約表
4. 預約明細表

• 顧客表
  CREATE TABLE CUSTOMER (
  CUSTOMER_ID NUMBER PRIMARY KEY,
  NAME VARCHAR2(50) NOT NULL,
  PHONE VARCHAR2(20) NOT NULL,
  EMAIL VARCHAR2(50),
  ADDRESS VARCHAR2(100)
  );

• 菜單表
  CREATE TABLE MENU (
  MENU_ID NUMBER PRIMARY KEY,
  MEAL_NAME VARCHAR2(50) NOT NULL,
  TYPE VARCHAR2(30),
  PRICE DECIMAL(10,2) NOT NULL,
  DETAIL VARCHAR2(100)
  );

• 預約表
  CREATE TABLE RESERVATION (
  RESERVATION_ID NUMBER PRIMARY KEY,
  CUSTOMER_ID NUMBER REFERENCES CUSTOMER(CUSTOMER_ID) NOT NULL,
  RESERVATION_ID DATE NOT NULL,
  TIME VARCHAR(10) NOT NULL,
  TABLE NUMBER NOT NULL,
  PEOPLE_AMOUNT INT NOT NULL,
  TOTAL DECIMAL(10,2),
  );

• 預約明細表
  **CREATE TABLE RESERVATION_DETAIL (
  RESERVATION_ID NUMBER PRIMARY KEY REFERENCES REVERSATION(RESERVATION_ID) NOT NULL,
  MENU_ID NUMBER REFERENCES MENU(MEAL_ID) NOT NULL,
  AMOUNT NUMBER NOT NULL,
  PRIMARY KEY (REVERSATION_ID, MEAL_ID),

);**