GUID 作为 SQLite 的唯一键
我找到了 使用 python 生成 GUID 例程。
运行代码给出以下结果。
GUID: 00000129e0e72d9b2aab3c1500ac001000e90001
Time: Sat, 17 Jul 2010 09:55:33 (millis: 0.787)
IP: 172.16.233.1
Counter: 715865109
该代码的注释有以下消息。
### GUIDs make wonderful database keys. They require no access to the ### database (to get the max index number), they are extremely unique, and they sort ### automatically by time. GUIDs prevent key clashes when merging ### two databases together, combining data, or generating keys in distributed ### systems.
问题
- 这可以与 SQLite 一起使用吗？据我所知，SQLite中的INTEGER类型是8字节，并且使用8字节，不可能以十进制存储值0x00000129e0e72d9b2aab3c1500ac001000e90001或101362835865894089778560972572099193929729。
- 有什么方法可以使用 SQLite 获得全局唯一 ID 吗？
I found GUID generation routine with python.
Running the code gives me the following results.
GUID: 00000129e0e72d9b2aab3c1500ac001000e90001
Time: Sat, 17 Jul 2010 09:55:33 (millis: 0.787)
IP: 172.16.233.1
Counter: 715865109
The comments of this code has the following message.
### GUIDs make wonderful database keys. They require no access to the ### database (to get the max index number), they are extremely unique, and they sort ### automatically by time. GUIDs prevent key clashes when merging ### two databases together, combining data, or generating keys in distributed ### systems.
Questions
- Does this work with SQLite? As far as I know INTEGER type in SQLite is 8 byte, and with 8 byte, it's not possible to store value 0x00000129e0e72d9b2aab3c1500ac001000e90001 or 101362835865894089778560972572099193929729 in decimal.
- Is there any way to get unique ID globally with SQLite?
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除了占用 32 个字节而不是 16 个字节之外，在 SQLite 中将 GUID 存储为文本有什么问题？
Other than the fact that it takes up 32 bytes instead of 16, what's wrong with storing a GUID as text in SQLite?
好文章可以帮助您做出决定...
主键：ID 与 GUID：
http://www.codinghorror.com/blog/2007/03/primary-keys-ids-versus-guids.html
Good article to help you get decision....
Primary Keys: IDs vs GUIDs:
http://www.codinghorror.com/blog/2007/03/primary-keys-ids-versus-guids.html
每个 SQLite 数据行都有一个 64 位本地唯一标识符。从表中选择 rowid...
Every SQLite data row has a 64 bit locally-unique identifier. SELECT rowid FROM table...