> You can't add a constraint to existing table in SQLite,(In SQL there is a option for do that). You
You can't add a constraint to existing table in SQLite,(In SQL there is a option for do that). You need to re-create the table with necessary contraints.
https://stackoverflow.com/questions/15497985/how-to-add-unique-constraint-to-existing-table-in-sqlite
Stack Overflow
I have an existing table in Sqlite. How do I add a unique constraint to it?
