创建数据库及表
首先，创建数据库，以及数据库中的表。在使用connect()连接数据库后，就可以通过定位指针cursor，来执行SQL命令：
importsqlite3 # test.db is a file in the working directory. conn = sqlite3.connect("test.db") cur = conn.cursor() # create tables cur.execute('''CREATE TABLE category (id int primary key, sort int, name text)''') cur.execute('''CREATE TABLE book (id int primary key, sort int, name text, price real, category int, FOREIGN KEY (category) REFERENCES category(id))''') # save the changes conn.commit() # close the connection with the database conn.close() 插入数据 importsqlite3 conn = sqlite3.connect("test.db") cur= conn.cursor() books = [(1, 1, 'Cook Recipe', 3.12, 1), (2, 3, 'python Intro', 17.5, 2), (3, 2, 'OS Intro', 13.6, 2), ] # execute "INSERT" cur.execute("INSERT INTO category VALUES (1, 1, 'kitchen')") # using the placeholder cur.execute("INSERT INTO category VALUES (?, ?, ?)", [(2, 2, 'computer')]) # execute multiple commands cur.executemany('INSERT INTO book VALUES (?, ?, ?, ?, ?)', books) conn.commit() conn.close()SQL语句中的参数，使用”?”作为替代符号，并在后面的参数中给出具体值。这里不建议用Python的格式化字符串，如”%s”，因为这一用法容易受到SQL注入攻击。
也可以用executemany()的方法来执行多次插入，增加多个记录。每个记录是表中的一个元素，如上面的books表中的元素。
查询 importsqlite3 conn = sqlite3.connect('test.db') cur = conn.cursor() # retrieve one record cur.execute('SELECT name FROM category ORDER BY sort') print(cur.fetchone()) print(cur.fetchone()) # retrieve all records as a list cur.execute('SELECT * FROM book WHERE book.category=1') print(cur.fetchall()) # iterate through the records for rowin cur.execute('SELECT name, price FROM book ORDER BY sort'): print(row) 更新与删除可以更新某个记录，或者删除记录：
conn = sqlite3.connect("test.db") cur = conn.cursor() cur.execute('UPDATE book SET price=? WHERE id=?',(1000, 1)) cur.execute('DELETE FROM book WHERE id=2') conn.commit() conn.close()也可以直接删除整张表：
cur.execute('DROP TABLE book')如果删除test.db，那么整个数据库会被删除。