ALTER COLUMN in sqlite

How do I alter column in sqlite? This is in Postgresql

ALTER TABLE books_book ALTER COLUMN publication_date DROP NOT NULL;

I believe there is no ALTER COLUMN in sqlite at all, only ALTER TABLE is supported.

Any idea? Thanks!

There's no ALTER COLUMN in sqlite.

I believe your only option is to:

• Rename the table to a temporary name
• Create a new table without the NOT NULL constraint
• Copy the content of the old table to the new one
• Remove the old table

This other Stackoverflow answer explains the process in details