Translate the following question to SQL: What is the booking status code of the apartment with apartment number "Suite 634"?

Schema: CREATE TABLE Apartment_Buildings (
    building_id INTEGER NOT NULL  PRIMARY KEY,
    building_short_name CHAR(15),
    building_full_name VARCHAR(80),
    building_description VARCHAR(255),
    building_address VARCHAR(255),
    building_manager VARCHAR(50),
    building_phone VARCHAR(80),
    UNIQUE (building_id)
);

CREATE TABLE Apartments (
    apt_id INTEGER NOT NULL  PRIMARY KEY,
    building_id INTEGER NOT NULL,
    apt_type_code CHAR(15),
    apt_number CHAR(10),
    bathroom_count INTEGER,
    bedroom_count INTEGER,
    room_count CHAR(5),
    UNIQUE (apt_id),
    FOREIGN KEY (building_id) REFERENCES Apartment_Buildings(building_id)
);

CREATE TABLE Apartment_Facilities (
    apt_id INTEGER NOT NULL  PRIMARY KEY,
    facility_code CHAR(15) NOT NULL  PRIMARY KEY,
    PRIMARY KEY (apt_id, facility_code),
    UNIQUE (apt_id, facility_code),
    FOREIGN KEY (apt_id) REFERENCES Apartments(apt_id)
);

CREATE TABLE Guests (
    guest_id INTEGER NOT NULL  PRIMARY KEY,
    gender_code CHAR(1),
    guest_first_name VARCHAR(80),
    guest_last_name VARCHAR(80),
    date_of_birth DATETIME,
    UNIQUE (guest_id)
);

CREATE TABLE Apartment_Bookings (
    apt_booking_id INTEGER NOT NULL  PRIMARY KEY,
    apt_id INTEGER,
    guest_id INTEGER NOT NULL,
    booking_status_code CHAR(15) NOT NULL,
    booking_start_date DATETIME,
    booking_end_date DATETIME,
    UNIQUE (apt_booking_id),
    FOREIGN KEY (guest_id) REFERENCES Guests(guest_id),
    FOREIGN KEY (apt_id) REFERENCES Apartments(apt_id)
);

CREATE TABLE View_Unit_Status (
    apt_id INTEGER,
    apt_booking_id INTEGER,
    status_date DATETIME NOT NULL  PRIMARY KEY,
    available_yn BIT,
    UNIQUE (status_date),
    FOREIGN KEY (apt_booking_id) REFERENCES Apartment_Bookings(apt_booking_id),
    FOREIGN KEY (apt_id) REFERENCES Apartments(apt_id)
);
user
SELECT T1.booking_status_code FROM Apartment_Bookings AS T1 JOIN Apartments AS T2 ON T1.apt_id  =  T2.apt_id WHERE T2.apt_number  =  "Suite 634"
assistant