Thank you for the correction! In this case, is the output row from the first query expected? Assuming v3 is being calculated as `NULL`, we replaced v3 into `NULL` in the WHERE clause of the first query and observe this: ```SQL CREATE TABLE v0 ( v1); INSERT INTO v0 VALUES ( 255); ALTER TABLE v0 ADD COLUMN v3 AS ( NULL) NOT NULL; SELECT "-----"; SELECT * FROM v0 WHERE NULL NOT IN ( SELECT count ( * ) FROM v0); /* Return NULL */ ``` This is expected but mismatched with the original outputs.