Postgresq“错误：语法错误在或接近”但没有明显的语法错误

Question

我遇到了一个奇怪的问题。我正在尝试在 postgresql 中创建一个视图，但我收到了标题中提到的错误。据我所知，我没有任何语法错误，但 postgres 仍然抛出错误。我做错了什么？

这是我遇到问题的视图和相应的表：

CREATE VIEW ReservationsView AS
SELECT code, date FROM Reservations,
period, start, "end" FROM Periods,
room FROM Rooms,
name FROM Users
FROM Reservations A
INNER JOIN Periods B
ON A.room = B.room
INNER JOIN Rooms C
ON A.room = C.room
INNER JOIN Users D
ON A."user" = D."user"
ORDER BY A.code DESC;

CREATE TABLE Reservations (
    code SERIAL PRIMARY KEY, 
    abbr VARCHAR(5), 
    room INT, 
    date DATE NOT NULL, 
    period CHAR(1), 
    "user" INT, 
    FOREIGN KEY (abbr, room) REFERENCES Rooms (abbr, room), 
    FOREIGN KEY (period) REFERENCES Periods (period),
    FOREIGN KEY ("user") REFERENCES Users ("user")
);

CREATE TABLE Periods (
    period CHAR(1) PRIMARY KEY, 
    start TIME NOT NULL, 
    "end" TIME NOT NULL
);