如何使用python和sqlite3创建新数据库

Question

import sqlite3

conn = sqlite3.connect(r"D:\aaa.db")

Is there a way to automatically create the db file if it doesn't already exist when I connect to it?

Answer 1

如果不存在，您提供的代码确实会创建'D:\\\\aaa.db' 。

Answer 2

如果它不是自动创建的，请确保您拥有正确的目录权限

Answer 3

As it was already mentioned, your code should work if you have permissions to write for this path. However, it is important that directory must exist . If you make call for non-existing folder:

conn = sqlite3.connect(r"D:\Some new non-existing folder\aaa.db")

It will not work, you will have

sqlite3.OperationalError: unable to open database file. 

The same is for relative paths:

1) conn = sqlite3.connect(r"aaa.db") 
2) conn = sqlite3.connect(r"Some new folder\aaa.db")

First will always work, because you are working in already existing directory and second will not work if you do not create te folder beforehand.

Answer 4

如果文件不存在，很确定 .connect 将创建该文件。

Answer 5

import sqlite3
conn=sqlite3.connect('xx.db')
print "Database created and opened succesfully"

Answer 6

.connect 应该即时创建一个新的数据库文件，因为子目录确实存在，并且您有足够的权限。