sqlite3 python ATTACH DATABASE复制表.schema

Question

系统

• Python 2.7
• SQLite3

码

我想通过将表从_bak.db复制到正在使用的.db中来恢复数据库的备份。

conn = sqlite3.connect(os.path.join("data", "db", "Kanji-story.db"))
c = conn.cursor()
c.execute("DROP TABLE IF EXISTS current")

c.execute("ATTACH DATABASE ? AS db2", (os.path.join('data', 'db', 'Kanji-story_bak.db'),))

# TODO Code for Creating table with the same structure
c.execute("INSERT INTO main.current SELECT * FROM db2.current")

题

要执行最后一条语句，我首先必须在Kanji-story.db中创建一个表，其结构与Kanji-story_bak.db相同（请参阅＃TODO）。如何创建具有相同结构的表？我知道SQLite3中有.schema命令，但是如何有效地使用该命令创建新表呢？

Answer 1

受到@CL答案的启发。，完整代码为：

conn = sqlite3.connect(os.path.join("data", "db", "Kanji-story.db"))
c = conn.cursor()
c.execute("DROP TABLE IF EXISTS current")

c.execute("ATTACH DATABASE ? AS db2", (os.path.join('data', 'db', 'Kanji-story_bak.db'),))

c.execute("SELECT sql FROM db2.sqlite_master WHERE type='table' AND name='current'")
c.execute(c.fetchone()[0]) # Contains: CREATE TABLE current (framenum INTEGER, nextKanji INTEGER)
c.execute("INSERT INTO main.current SELECT * FROM db2.current")

conn.commit()
conn.close()