从一个表中检索数据并放入另一个PYTHON SQL

Question

Trying to take a piece of data from at table in the database and inserting it into another table:

Fetching the order total and assigning it to variable:

cursor.execute('''SELECT Price FROM Tracks WHERE TrackID = ?''', (trackChoice,))
ordertotal = str(cursor.fetchall())

Putting it into table:

cursor.execute('''INSERT INTO Orders(OrderID, Date, OrderTotal, CustomerID, TrackID) VALUES(?, ?, ?, ?, ?)''', (orderID, date, 
ordertotal, customerID, trackChoice))

Error:

sqlite3.InterfaceError: Error binding parameter 2 - probably unsupported type.

Answer 1

With cursor.fetchall() you get all the rows in 'Tracks'. So it will have an ID and probably other informations as well. fE something like this: (1, 'William', 'Shakespeare', 'm', None, '1961-10-25'). What is 'ordertotal'? I guess it will be a number? If yes, and you are using sqlite3 you could use row_factory. See the answere here for more information: Get a list of field values from Python's sqlite3, not tuples representing rows

Answer 2

Why not just do:

cursor.execute("""
INSERT INTO Orders(name, Date, name, name, name)
    VALUES(?, strftime('now'), ?, ?, ?)""",
                   (value, value, value, value);

That is, use the current time in the database.

(I assume that name is really four different columns or you should get another error.)