Question

Currently, Python is storing the string “None” for nulls returned by sqlite3. I read that you can change the default value for nulls in sqlite3 at the command line, but can you set this within the Python code?

I’d like all of my blank results to look the same without having to loop through and check each value. So I want any nulls returned from sqlite3 to be an empty string (“”) instead of “None”.

Answer 1

Uses the SQL-Function COALESCE for each column of your left join.

SELECT 
  a.id, a.value, 
  COALESCE(b.id, ''), COALESCE(b.value, '')
FROM 
  a 
  LEFT OUTER JOIN b ON b.a_id = a.id