Easily move databases

[yanwenjie1]

I used to use the local SQLite3 database (start command label studio start - p 8081) before, but now I want to switch to the local PGSQL database (start command label studio - db postgreSQL - p 8081), or switch from PGSQL to SQLite3.
But I found that the data is not interconnected. Is there a convenient command to synchronize user information and annotation data with each other.Thanks.