Python sqlite3 package

Python has a built-in package called sqlite3 that implements SQLite.

Basic Workflow

Connect to a database: A Connection object represents the database.
```
import sqlite3
conn = sqlite3.connect('example.db')
```
Create a cursor: A Cursor object is used to interact with the database.
```
c = conn.cursor()
```

Execute SQL commands:

c.execute('''CREATE TABLE stocks
             (date text, trans text, symbol text, qty real, price real)''')

Insert data:

c.execute("INSERT INTO stocks VALUES ('2006-01-05','BUY','RHAT',100,35.14)")

To insert many records, use executemany:

purchases = [('2006-03-28', 'BUY', 'IBM', 1000, 45.00),
             ('2006-04-05', 'BUY', 'MSFT', 1000, 72.00),
             ('2006-04-06', 'SELL', 'IBM', 500, 53.00),
            ]
c.executemany('INSERT INTO stocks VALUES (?,?,?,?,?)', purchases)

Using ? as a placeholder is important to prevent SQL injection attacks.

Commit the changes:
```
conn.commit()
```

Query the database:

for row in c.execute('SELECT * FROM stocks ORDER BY price'):
    print(row)

Close the connection:
```
conn.close()
```

Important point: Unlike many other RDBMSs, SQLite does not allow multiple connections to the same database at the same time.