备份整个数据库的方法：
# coding=utf-8 import sqlite3 def testBakSqlite(): conn = sqlite3.connect("sqlite_db_mine/testDB.db") with open(‘testDB.sql.bak‘,‘w‘) as f: for line in conn.iterdump(): data = line + ‘\n‘ data = data.encode("utf-8") f.write(data) testBakSqlite()
如果想要备份其中的一个表，没有很好的办法。下面是一些网上的讨论。
http://stackoverflow.com/questions/6677540/how-do-i-dump-a-single-sqlite3-table-in-python
You can copy only the single table in an in memory db:
import sqlite3 def getTableDump(db_file, table_to_dump): conn = sqlite3.connect(‘:memory:‘) cu = conn.cursor() cu.execute("attach database ‘" + db_file + "‘ as attached_db") cu.execute("select sql from attached_db.sqlite_master " "where type=‘table‘ and name=‘" + table_to_dump + "‘") sql_create_table = cu.fetchone()[0] cu.execute(sql_create_table); cu.execute("insert into " + table_to_dump + " select * from attached_db." + table_to_dump) conn.commit() cu.execute("detach database attached_db") return "\n".join(conn.iterdump()) TABLE_TO_DUMP = ‘table_to_dump‘ DB_FILE = ‘db_file‘ print getTableDump(DB_FILE, TABLE_TO_DUMP)
Pro: Simplicity and reliability: you don‘t have to re-write any library method, and you are more assured that the code is compatible with future versions of the sqlite3 module.
Con: You need to load the whole table in memory, which may or may not be a big deal depending on how big the table is, and how much memory is available.
原文：http://www.cnblogs.com/dplearning/p/5982267.html