A fails because it has an Aggregate Function in the WHERE clause
B fails because it has a single column and an Aggregate Function in the SELECT clause but then it does not include a GROUP BY clause on the single column.
A voting comment increases the vote count for the chosen answer by one.
Upvoting a comment with a selected answer will also increase the vote count towards that answer by one.
So if you see a comment that you already agree with, you can upvote it instead of posting a new comment.
hggz
4 years, 11 months agoqayaza
4 years, 6 months agoSugar
5 years, 1 month agoduongvietnam
5 years ago