Python code and SQLite3 won't INSERT data in table Pycharm? - python-3.x

Question

What am I doing wrong here? It run's without error, it has created table, but rows are empty. Why?
import sqlite3
sqlite_file = (r"C:\Users\Dragan\PycharmProjects\MyProject\ArchLib2.db")
conn = sqlite3.connect(sqlite_file)
cursor = conn.cursor()
table_name = 'Archive'
sql = 'CREATE TABLE IF NOT EXISTS ' + table_name + '("first_name" varchar NOT NULL, "second_name" varchar NOT NULL)'
cursor.execute(sql)
sql = 'INSERT INTO ' + table_name + '(first_name,second_name) VALUES ("value1","value2");'
cursor.execute(sql)
cursor.close()

Answer 1

Ok so I found why it didn't INSERT data into table.
data in sql = string didnt have good formating ( this ' must be replaced with this "
second if you have string value like "value1" it has to have backslash on both sides like this "\value1\"
third and most important after insert execution line you have to add this line conn.commit()
Final code looks like this:
import sqlite3
sqlite_file = (r"C:\Users\Dragan\PycharmProjects\MyProject\ArchLib2.db")
conn = sqlite3.connect(sqlite_file)
cursor = conn.cursor()
table_name = 'Archive'
sql = "CREATE TABLE IF NOT EXISTS " + table_name + "(first_name varchar NOT NULL, datetime)"
cursor.execute(sql)
sql = "INSERT INTO " + table_name + "(first_name,datetime) VALUES (\"value1\",CURRENT_TIMESTAMP)"
cursor.execute(sql)
conn.commit()
cursor.close()