"Creating a simple SQLite-based app with Python" source code

sqlite-python.py

"""
This is free and unencumbered software released into the public domain.

Anyone is free to copy, modify, publish, use, compile, sell, or
distribute this software, either in source code form or as a compiled
binary, for any purpose, commercial or non-commercial, and by any
means.

In jurisdictions that recognize copyright laws, the author or authors
of this software dedicate any and all copyright interest in the
software to the public domain. We make this dedication for the benefit
of the public at large and to the detriment of our heirs and
successors. We intend this dedication to be an overt act of
relinquishment in perpetuity of all present and future rights to this
software under copyright law.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
OTHER DEALINGS IN THE SOFTWARE.

For more information, please refer to <http://unlicense.org/>
"""

import sqlite3


#
# Establishing connection
#

# open a SQLite connection
# a database file called data.db will be created,
# if it does not exist
connection = sqlite3.connect('data.db')

# create a database cursor
cur = connection.cursor()

#
# Creating the table
#

# create the database table if it doesn't exist
table_schema = """
CREATE TABLE IF NOT EXISTS notes (
    id INTEGER PRIMARY KEY,
    name TEXT NOT NULL,
    description TEXT
);
"""
cur.execute(table_schema)

#
# Inserting to the database
#

name = input('Note name: ')
desc = input('Note description: ')

# insert some hard-coded data
insert_query = """
INSERT INTO notes (name, description)
VALUES (?, ?);
"""
cur.execute(insert_query, (name, desc))

# save it in the database file
connection.commit()

#
# Querying the database
#

# query the database for ALL data in the notes table
cur.execute('SELECT * FROM notes;')

# print the result
print('\nNotes:')
for row in cur.fetchall():
    display_name = row[1]
    display_desc = row[2]

    print(f'Note name: {display_name}\nNote description: {display_desc}\n')

#
# Cleaning up
#

# close the cursor
cur.close()

# close the connection
connection.close()