I missed it because ,
although inserts a record from the second insert statement,
the first insert statement fails, I guess rendering that query failed,even though something has been inserted.
This is why 74% missed query 4 , and only 66% missed query 5 and 7.
Very trickey, also I did the bonehead move of not selecting 3 answers, I need to pay more attention to what the question is asking. :hehe: