Translate the following question to SQL: What are all the location codes and location names?

Schema: CREATE TABLE Ref_Document_Types (
    Document_Type_Code CHAR(15) NOT NULL  PRIMARY KEY,
    Document_Type_Name VARCHAR(255) NOT NULL,
    Document_Type_Description VARCHAR(255) NOT NULL,
    UNIQUE (Document_Type_Code)
);

CREATE TABLE Ref_Calendar (
    Calendar_Date DATETIME NOT NULL  PRIMARY KEY,
    Day_Number INTEGER,
    UNIQUE (Calendar_Date)
);

CREATE TABLE Ref_Locations (
    Location_Code CHAR(15) NOT NULL  PRIMARY KEY,
    Location_Name VARCHAR(255) NOT NULL,
    Location_Description VARCHAR(255) NOT NULL,
    UNIQUE (Location_Code)
);

CREATE TABLE Roles (
    Role_Code CHAR(15) NOT NULL  PRIMARY KEY,
    Role_Name VARCHAR(255),
    Role_Description VARCHAR(255),
    UNIQUE (Role_Code)
);

CREATE TABLE All_Documents (
    Document_ID INTEGER NOT NULL  PRIMARY KEY,
    Date_Stored DATETIME,
    Document_Type_Code CHAR(15) NOT NULL,
    Document_Name CHAR(255),
    Document_Description CHAR(255),
    Other_Details VARCHAR(255),
    FOREIGN KEY (Date_Stored) REFERENCES Ref_Calendar(Calendar_Date),
    FOREIGN KEY (Document_Type_Code) REFERENCES Ref_Document_Types(Document_Type_Code)
);

CREATE TABLE Employees (
    Employee_ID INTEGER NOT NULL  PRIMARY KEY,
    Role_Code CHAR(15) NOT NULL,
    Employee_Name VARCHAR(255),
    Gender_MFU CHAR(1) NOT NULL,
    Date_of_Birth DATETIME NOT NULL,
    Other_Details VARCHAR(255),
    FOREIGN KEY (Role_Code) REFERENCES Roles(Role_Code)
);

CREATE TABLE Document_Locations (
    Document_ID INTEGER NOT NULL  PRIMARY KEY,
    Location_Code CHAR(15) NOT NULL  PRIMARY KEY,
    Date_in_Location_From DATETIME NOT NULL  PRIMARY KEY,
    Date_in_Locaton_To DATETIME,
    PRIMARY KEY (Document_ID, Location_Code, Date_in_Location_From),
    UNIQUE (Document_ID, Location_Code, Date_in_Location_From),
    FOREIGN KEY (Document_ID) REFERENCES All_Documents(Document_ID),
    FOREIGN KEY (Date_in_Locaton_To) REFERENCES Ref_Calendar(Calendar_Date),
    FOREIGN KEY (Date_in_Location_From) REFERENCES Ref_Calendar(Calendar_Date),
    FOREIGN KEY (Location_Code) REFERENCES Ref_Locations(Location_Code)
);

CREATE TABLE Documents_to_be_Destroyed (
    Document_ID INTEGER NOT NULL  PRIMARY KEY,
    Destruction_Authorised_by_Employee_ID INTEGER,
    Destroyed_by_Employee_ID INTEGER,
    Planned_Destruction_Date DATETIME,
    Actual_Destruction_Date DATETIME,
    Other_Details VARCHAR(255),
    FOREIGN KEY (Document_ID) REFERENCES All_Documents(Document_ID),
    FOREIGN KEY (Actual_Destruction_Date) REFERENCES Ref_Calendar(Calendar_Date),
    FOREIGN KEY (Planned_Destruction_Date) REFERENCES Ref_Calendar(Calendar_Date),
    FOREIGN KEY (Destruction_Authorised_by_Employee_ID) REFERENCES Employees(Employee_ID),
    FOREIGN KEY (Destroyed_by_Employee_ID) REFERENCES Employees(Employee_ID)
);
user
SELECT location_code ,  location_name FROM Ref_locations
assistant