如何将它插入我的桌子上？

Question

Creating my table:

 cursor.execute("""
   CREATE TABLE if not exists intraday_quote (
   id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT,
   symbol VARCHAR(10) NOT NULL,
   date DATE,
   time DATE,
   open FLOAT,
   high FLOAT,
   low FLOAT,
   close FLOAT,
   volume INTEGER);
   """)

and I`m trying to insert this:

    conn = sqlite3.connect('intraday_quote.db')
    cursor = conn.cursor()
    # Prepare SQL query to INSERT a record into the database.
    sql = """INSERT INTO intraday_quote(symbol) VALUES ('Mac123432')"""
    cursor.execute(sql)

No insertion happened in the database. What I am missing?

Answer 1

You need to commit your changes so they can get into effect in database. commit all db operations like update, insert.

cursor.commit()

after your execute is succeeded. You can get return of the cursor.execute . If it is not None then you can try committing the changes else use rollback (exercise for you :) ) so you wont end up with wrong data updated in database.

Answer 2

You need to do conn.commit() to see the changes in the database. Quoting the documentation

This method commits the current transaction. If you don't call this method, anything you did since the last call to commit() is not visible from other database connections. If you wonder why you don't see the data you've written to the database, please check you didn't forget to call this method.