How do i resolve the 'cannot insert null into column' sql error?

This error occurs when you try to insert a NULL value into a column that doesn't accept NULLs. Example:

INSERT INTO users (id, username) VALUES (NULL, 'JohnDoe');

Solution:

-- Ensure you provide a non-NULL value or set the column to auto-increment
INSERT INTO users (id, username) VALUES (1, 'JohnDoe');

Always make sure the columns that don't accept NULLs have appropriate values provided.