不要使用已删除的主键

Question

插入 id 1 和 2。删除 id 2。插入新行，它得到 id 2 而不是 3。我该如何更改？我不想重复使用主键。

import sqlite3, os

os.remove('mydatabase.db')
conn = sqlite3.connect("mydatabase.db") # or use :memory: to put it in RAM
cursor = conn.cursor()

# create a table
cursor.execute("CREATE TABLE if not exists albums (id INTEGER PRIMARY KEY NOT NULL, title text, artist text, release_date text, publisher text, media_type text)")
cursor.execute("CREATE TABLE if not exists anti (id INTEGER, title text, artist text, release_date text, publisher text, media_type text)")
conn.commit()

cursor.execute("INSERT INTO albums VALUES (null, 'Glow', 'Andy Hunter', '7/24/2012', 'Xplore Records', 'MP3')")
cursor.execute("INSERT INTO albums VALUES (null, 'second', 'artist', '7/24/2012', 'Xplore Records', 'MP3')")
conn.commit()

cursor.execute("SELECT * FROM albums")
print(cursor.fetchall())

cursor.execute("INSERT INTO anti SELECT * FROM albums WHERE title='second'")
cursor.execute("DELETE FROM albums WHERE title='second'")
cursor.execute("INSERT INTO albums VALUES (null, 'third', 'artist', '7/24/2012', 'Xplore Records', 'MP3')")
conn.commit()

cursor.execute("SELECT * FROM albums")
print(cursor.fetchall())
cursor.execute("SELECT * FROM anti")
print(cursor.fetchall())

Answer 1

来自https://www.sqlite.org/autoinc.html：

如果 AUTOINCREMENT 关键字出现在 INTEGER PRIMARY KEY 之后，则会更改自动 ROWID 分配算法，以防止在数据库的生命周期内重复使用 ROWID。换句话说，AUTOINCREMENT 的目的是防止重复使用以前删除的行中的 ROWID。