Creating a SQL database script for fictional restaurant - sql

Question

im making a fictional database for a ficitonal restaurant. I managed to write most of SQL script myself and it works. Like creating tables, inserting fake data. However I am not sure how to connect a meal to an order and table, and bill to a meal, and all of that to a customer.
Here is my script (the commented out foreign keys are what i dont know how to connect, or how to edit them so its all connected as i mentioned above):
DROP DATABASE IF EXISTS restaurantDB;
CREATE DATABASE restaurantDB;
USE restaurantDB;
CREATE TABLE `bill` (
`billID` int NOT NULL AUTO_INCREMENT,
`payAmount` varchar(6) NOT NULL,
PRIMARY KEY (`billID`)
);
INSERT INTO `bill` VALUES (1, '$258');
CREATE TABLE `customer` (
`customerID` int NOT NULL AUTO_INCREMENT,
`firstName` varchar(255) NOT NULL,
`lastName` varchar(255) NOT NULL,
`phone` varchar(20) NOT NULL,
PRIMARY KEY (`customerID`)
);
INSERT INTO `customer` VALUES (1, 'Bruce', 'Lee', '420420589');
CREATE TABLE `meal` (
`mealID` int NOT NULL AUTO_INCREMENT,
`sides` varchar(255) NULL,
`main` varchar(255) NULL,
`beverage` varchar(255) NOT NULL,
PRIMARY KEY (`mealID`)
);
INSERT INTO `meal` VALUES (1, 'potatos', 'steak', 'wine');
CREATE TABLE `order` (
`orderID` int NOT NULL,
`time` datetime(2) NOT NULL ON UPDATE CURRENT_TIMESTAMP,
PRIMARY KEY (`orderID`)
);
INSERT INTO `order` VALUES (1, '21-09-27 13:36:06');
CREATE TABLE `reservation` (
`reservationID` int NOT NULL AUTO_INCREMENT,
`checkIn` datetime(2) NOT NULL,
`checkOut` datetime(2) NOT NULL,
PRIMARY KEY (`reservationID`)
);
INSERT INTO `reservation` VALUES (1, '21-09-27 13:24:06', '21-09-27 14:17:23');
CREATE TABLE `table` (
`tableID` int NOT NULL AUTO_INCREMENT,
`numOfSeats` int NOT NULL,
PRIMARY KEY (`tableID`)
);
INSERT INTO `table` VALUES (1, 1);
/* ALTER TABLE `table` ADD CONSTRAINT `fk_bill_table_1` FOREIGN KEY (`tableID`) REFERENCES `table` (`billID`);
ALTER TABLE `order` ADD CONSTRAINT `fk_order_table_1` FOREIGN KEY (`orderID`) REFERENCES `table` (`tableID`);
ALTER TABLE `order` ADD CONSTRAINT `fk_order_meal_1` FOREIGN KEY (`orderID`) REFERENCES `meal` (`mealID`);
ALTER TABLE `order` ADD CONSTRAINT `fk_order_bill_1` FOREIGN KEY (`orderID`) REFERENCES `bill` (`billID`);
ALTER TABLE `reservation` ADD CONSTRAINT `fk_reservation_customer_1` FOREIGN KEY (`reservationID`) REFERENCES `customer` (`customerID`);
ALTER TABLE `table` ADD CONSTRAINT `fk_table_reservation_1` FOREIGN KEY (`tableID`) REFERENCES `reservation` (`reservationID`); */
Here is also a picture of the diagram (not sure if it makes sense connected like i have it currently tho):
Thanks to anyone who will be able to explain and help make the connections.

Answer 1

Okay, so finally got it working. Thanks #Austin.
Actually the only issue I had was with the datetime(2) it was just supposed to say datetime.
However #Austin showed me a better alternative, so I will create also a second, extended database with the relations #Austin suggested and add onto that.