我试图将查询应用于数据库，该数据库负责创建表并用数据填充它，但是它似乎不起作用，总是给我
关键字“ IF”附近的语法不正确。 我也不擅长使用SQL来发现问题，所以我希望有人能帮助我找出问题所在的地方
问题：查询应创建表并用数据填充它们 但它不起作用，并且显示了我没有提到的上述错误 知道它的含义以及解决方法
提前谢谢
查询：
-- RESTAURANT DB
-- TABLE CREATION
DROP TABLE IF EXISTS ORDER_t;
DROP TABLE IF EXISTS FOOD_t;
DROP TABLE IF EXISTS PAYMENT_t;
DROP TABLE IF EXISTS BILL_t;
DROP TABLE IF EXISTS CUSTOMER_t;
DROP TABLE IF EXISTS TABLE_t;
DROP TABLE IF EXISTS HOST_t;
DROP TABLE IF EXISTS CHEF_t;
DROP TABLE IF EXISTS WAITER_t;
DROP TABLE IF EXISTS EMPLOYEE_t;
DROP TABLE IF EXISTS MANAGER_t;
CREATE TABLE MANAGER_t
(
ManagerID INT NOT NULL,
M_Name VARCHAR(20) NOT NULL,
Salary INT,
CONSTRAINT MANAGER_PK PRIMARY KEY (ManagerID)
);
CREATE TABLE EMPLOYEE_t
(
EmployeeID INT NOT NULL,
E_Name VARCHAR(20) NOT NULL,
Date_hired DATE,
Hourly_pay INT,
ManagerID INT NOT NULL,
CONSTRAINT EMPLOYEE_PK PRIMARY KEY (EmployeeID),
CONSTRAINT EMPLOYEE_FK FOREIGN KEY (ManagerID) REFERENCES MANAGER_t(ManagerID)
);
CREATE TABLE WAITER_t
(
WaiterID INT NOT NULL,
Tips INT,
CONSTRAINT WAITER_PK FOREIGN KEY (WaiterID) REFERENCES EMPLOYEE_t(EmployeeID)
);
CREATE TABLE CHEF_t
(
ChefID INT NOT NULL,
Station VARCHAR(10),
Day_or_night VARCHAR(5),
CONSTRAINT CHEF_PK FOREIGN KEY (ChefID) REFERENCES EMPLOYEE_t(EmployeeID)
);
CREATE TABLE HOST_t
(
HostID INT NOT NULL,
Tips INT,
CONSTRAINT HOST_PK FOREIGN KEY (HostID) REFERENCES EMPLOYEE_t(EmployeeID)
);
CREATE TABLE TABLE_t
(
TableNo INT NOT NULL,
Available_seats INT,
HostID INT NOT NULL,
WaiterID INT NOT NULL,
CONSTRAINT TABLE_PK PRIMARY KEY (TableNo),
CONSTRAINT TABLE_FK1 FOREIGN KEY (HostID) REFERENCES HOST_t(HostID),
CONSTRAINT TABLE_FK2 FOREIGN KEY (WaiterID) REFERENCES WAITER_t(WaiterID)
);
CREATE TABLE CUSTOMER_t
(
CustID INT NOT NULL,
C_Name VARCHAR(20),
Phone VARCHAR(10),
TableNo INT NOT NULL,
CONSTRAINT CUSTOMER_PK PRIMARY KEY (CustID),
CONSTRAINT CUSTOMER_FK FOREIGN KEY (TableNo) REFERENCES TABLE_t(TableNo)
);
CREATE TABLE BILL_t
(
BillNo INT NOT NULL,
Amount INT,
CustID INT NOT NULL,
CONSTRAINT BILL_PK PRIMARY KEY (BillNo),
CONSTRAINT BILL_FK FOREIGN KEY (CustID) REFERENCES CUSTOMER_t(CustID)
);
CREATE TABLE PAYMENT_t
(
PaymentNo INT NOT NULL,
Amount INT,
Type VARCHAR(8),
CustID INT NOT NULL,
CONSTRAINT PAYMENT_PK PRIMARY KEY (PaymentNo),
CONSTRAINT PAYMENT_FK FOREIGN KEY (CustID) REFERENCES BILL_t(CustID)
);
CREATE TABLE FOOD_t
(
FoodID INT NOT NULL,
Name VARCHAR(20),
Price INT,
ChefID INT NOT NULL,
CONSTRAINT FOOD_PK PRIMARY KEY (FoodID),
CONSTRAINT FOOD_FK FOREIGN KEY (ChefID) REFERENCES CHEF_t(ChefID)
);
CREATE TABLE ORDER_t
(
Order_time TIME,
CustID INT NOT NULL,
WaiterID INT NOT NULL,
FoodID INT NOT NULL,
CONSTRAINT ORDER_FK1 FOREIGN KEY (CustID) REFERENCES CUSTOMER_t(CustID),
CONSTRAINT ORDER_FK2 FOREIGN KEY (WaiterID) REFERENCES WAITER_t(WaiterID),
CONSTRAINT ORDER_FK3 FOREIGN KEY (FoodID) REFERENCES FOOD_t(FoodID)
);
-- DATA INSERTION
-- INSERT INTO MANAGER_t VALUES (ManagerID, Name, Salary);
INSERT INTO MANAGER_t VALUES (1000, 'Suzie Smith', 55000);
INSERT INTO MANAGER_t VALUES (1001, 'Jerry Miller', 55000);
INSERT INTO MANAGER_t VALUES (1002, 'George Hill', 56000);
INSERT INTO MANAGER_t VALUES (1003, 'Elaine Scott', 60000);
INSERT INTO MANAGER_t VALUES (1004, 'Jim Kramer', 57000);
INSERT INTO MANAGER_t VALUES (1005, 'Michelle Garcia', 59000);
-- INSERT INTO EMPLOYEE_t VALUES (EmployeeID, Name, Date_hired, Hourly_pay, ManagerID);
INSERT INTO EMPLOYEE_t VALUES (2000, 'Bill Williams', '2016-05-31', 15, 1000);
INSERT INTO EMPLOYEE_t VALUES (2001, 'Sarah Jenkins', '2017-06-25', 16, 1000);
INSERT INTO EMPLOYEE_t VALUES (2002, 'Jim Benvoglio', '2017-07-21', 15, 1001);
INSERT INTO EMPLOYEE_t VALUES (2003, 'Chelsea Oldman', '2018-04-20', 17, 1001);
INSERT INTO EMPLOYEE_t VALUES (2004, 'Andy Grandberg', '2018-06-15', 15, 1001);
INSERT INTO EMPLOYEE_t VALUES (2010, 'Roberta Jones', '2018-11-25', 25, 1002);
INSERT INTO EMPLOYEE_t VALUES (2011, 'Elfonzo Duke', '2018-10-10', 20, 1002);
INSERT INTO EMPLOYEE_t VALUES (2012, 'Eric Brown', '2016-09-23', 21, 1002);
INSERT INTO EMPLOYEE_t VALUES (2013, 'Izabel Frisk', '2018-10-17', 23, 1003);
INSERT INTO EMPLOYEE_t VALUES (2014, 'Henri Menendez', '2017-04-15', 25, 1003);
INSERT INTO EMPLOYEE_t VALUES (2020, 'Sofia Gosselin', '2016-04-18', 15, 1004);
INSERT INTO EMPLOYEE_t VALUES (2021, 'Don Ligma', '2017-01-20', 15, 1004);
INSERT INTO EMPLOYEE_t VALUES (2022, 'Sarina Chastain', '2018-04-14', 16, 1004);
INSERT INTO EMPLOYEE_t VALUES (2023, 'Simonu Thomas', '2018-03-05', 17, 1005);
INSERT INTO EMPLOYEE_t VALUES (2024, 'Tom Cruz', '2017-05-10', 17, 1005);
-- INSERT INTO WAITER_t VALUES (WaiterID, Tips);
INSERT INTO WAITER_t VALUES (2000, 30);
INSERT INTO WAITER_t VALUES (2001, 45);
INSERT INTO WAITER_t VALUES (2002, 50);
INSERT INTO WAITER_t VALUES (2003, 36);
INSERT INTO WAITER_t VALUES (2004, 42);
-- INSERT INTO CHEF_t VALUES (ChefID, Station, Day_or_night);
INSERT INTO CHEF_t VALUES (2010, 'Entrees', 'Day');
INSERT INTO CHEF_t VALUES (2011, 'Sides', 'Day');
INSERT INTO CHEF_t VALUES (2012, 'Entrees', 'Night');
INSERT INTO CHEF_t VALUES (2013, 'Sides', 'Night');
INSERT INTO CHEF_t VALUES (2014, 'Entrees', 'Day');
-- INSERT INTO HOST_t VALUES (HostID, Tips);
INSERT INTO HOST_t VALUES (2020, 27);
INSERT INTO HOST_t VALUES (2021, 35);
INSERT INTO HOST_t VALUES (2022, 33);
INSERT INTO HOST_t VALUES (2023, 40);
INSERT INTO HOST_t VALUES (2024, 43);
-- INSERT INTO TABLE_t VALUES (TableNo, Available_seats, HostID, WaiterID);
INSERT INTO TABLE_t VALUES (100, 6, 2020, 2000);
INSERT INTO TABLE_t VALUES (101, 8, 2021, 2001);
INSERT INTO TABLE_t VALUES (102, 6, 2021, 2002);
INSERT INTO TABLE_t VALUES (103, 8, 2020, 2001);
INSERT INTO TABLE_t VALUES (104, 2, 2022, 2000);
INSERT INTO TABLE_t VALUES (105, 4, 2022, 2002);
-- INSERT INTO CUSTOMER_t VALUES (CustID, Name, Phone, TableNo);
INSERT INTO CUSTOMER_t VALUES (3000, 'Dan Hamberg', 6175550123, 100);
INSERT INTO CUSTOMER_t VALUES (3001, 'Phil Ivan', 6175550101, 100);
INSERT INTO CUSTOMER_t VALUES (3002, 'Joan Johnson', 6175559021, 100);
INSERT INTO CUSTOMER_t VALUES (3003, 'Dani Doyle', 6175557821, 103);
INSERT INTO CUSTOMER_t VALUES (3004, 'Ben Xu', 9785557821, 103);
INSERT INTO CUSTOMER_t VALUES (3005, 'Paul Kay', 9785557821, 103);
INSERT INTO CUSTOMER_t VALUES (3006, 'Clif Wampler', 9785558211, 105);
INSERT INTO CUSTOMER_t VALUES (3007, 'Clem Williams', 9785556742, 105);
-- INSERT INTO BILL_t VALUES (BillNo, Amount, CustID);
INSERT INTO BILL_t VALUES (800, 35, 3000);
INSERT INTO BILL_t VALUES (801, 40, 3001);
INSERT INTO BILL_t VALUES (802, 22, 3002);
INSERT INTO BILL_t VALUES (803, 15, 3003);
INSERT INTO BILL_t VALUES (804, 16, 3005);
INSERT INTO BILL_t VALUES (805, 20, 3007);
-- INSERT INTO PAYMENT_t VALUES (PaymentNo, Amount, Type, CustID);
INSERT INTO PAYMENT_t VALUES (900, 35, 'Debit', 3000);
INSERT INTO PAYMENT_t VALUES (901, 40, 'Cash', 3001);
INSERT INTO PAYMENT_t VALUES (902, 22, 'Debit', 3002);
INSERT INTO PAYMENT_t VALUES (903, 15, 'Credit', 3003);
INSERT INTO PAYMENT_t VALUES (904, 16, 'Cash', 3005);
INSERT INTO PAYMENT_t VALUES (905, 20, 'Cash', 3007);
-- INSERT INTO FOOD_t VALUES (FoodID, Name, Price, ChefID);
INSERT INTO FOOD_t VALUES (200, 'Cheeseburger', 10, 2012);
INSERT INTO FOOD_t VALUES (201, 'Chicken Wings', 11, 2012);
INSERT INTO FOOD_t VALUES (202, 'Lobster Roll', 19, 2013);
INSERT INTO FOOD_t VALUES (203, 'Clam Chowder', 8, 2013);
INSERT INTO FOOD_t VALUES (204, 'French Fries', 6, 2014);
INSERT INTO FOOD_t VALUES (205, 'BLT', 10, 2014);
INSERT INTO FOOD_t VALUES (206, 'Caesar Salad', 10, 2010);
INSERT INTO FOOD_t VALUES (207, 'Veggie Burger', 12, 2010);
-- INSERT INTO ORDER_t VALUES (Order_time, CustID, WaiterID, FoodID);
INSERT INTO ORDER_t VALUES ('12:05:00', 3000, 2000, 200);
INSERT INTO ORDER_t VALUES ('15:45:00', 3001, 2000, 201);
INSERT INTO ORDER_t VALUES ('15:35:00', 3002, 2000, 202);
INSERT INTO ORDER_t VALUES ('14:15:00', 3003, 2001, 203);
INSERT INTO ORDER_t VALUES ('16:05:00', 3005, 2001, 202);
INSERT INTO ORDER_t VALUES ('17:25:00', 3004, 2001, 204);
INSERT INTO ORDER_t VALUES ('17:15:00', 3007, 2002, 206);
INSERT INTO ORDER_t VALUES ('18:35:00', 3005, 2001, 206);
答案 0 :(得分：0)
您的脚本有参考定义错误。我已经附上了固定约束的代码。
CONSTRAINT HOST_PK FOREIGN KEY (HostID) REFERENCES EMPLOYEE_t(EmployeeID)
CONSTRAINT TABLE_FK1 FOREIGN KEY (HostID) REFERENCES EMPLOYEE_t(EmployeeID)
CONSTRAINT TABLE_FK2 FOREIGN KEY (WaiterID) REFERENCES EMPLOYEE_t(EmployeeID)
CONSTRAINT FOOD_FK FOREIGN KEY (ChefID) REFERENCES EMPLOYEE_t(EmployeeID)
CONSTRAINT ORDER_FK2 FOREIGN KEY (WaiterID) REFERENCES EMPLOYEE_t(EmployeeID)
答案 1 :(得分：0)
DROP IF EXISTS构造可从SQL Server 2016开始进行。 也许问题是您试图在SQL Server的早期版本（或MySQL版本）上执行查询？