Query to import users from Prod SA schema to QA schema

Hi All,

Good Day !!

Kindly assist me with the below requirement.
We have 1000+ users in Prod region. I need to import all these users to Site Admin list in QA region.
Please provide me the SQL query for this. Which are the tables in SA schema that should get updated ?

We had tried to export and import from SQL DB. But for some reason, users were not able to login after this was executed. 
Hence we plan to query the td. users table from Prod and then move to QA

Thanks,

Rarima.