php+mysql high concurrency how to download data in a loop based on ID to avoid duplication (interface)
For example, the table content is
id name
1 a
2 b
3 c
4 d
th The first download id is 1
The second download id is 2
The third download id is 3
The fourth download id is 4
## After #id is 4, it starts from 1 again and keeps looping indefinitely. It must be able to support high concurrency! Before I used to save the id in another table. Every time I downloaded, I read the last id from the table. When downloading the data, I just needed data larger than this id, but the concurrency was high. Duplicate data will be downloaded, and it is a bit troublesome to operate another table. Does anyone have any other good methods?