0 votes 0 votes Student table ROLLNO NAME MARKS1 MARKS2 1 T 50 30 2 S 70 99 3 D NULL 10 NULL NULL 78 NULL NULL NULL NULL NULL a) select count(MARKS1) from student; b) select count(*) from student; Databases databases query sql + – Tuhin Dutta asked Dec 15, 2017 • edited Dec 15, 2017 by Tuhin Dutta Tuhin Dutta 410 views answer comment Share Follow See all 2 Comments See all 2 2 Comments reply Ashwin Kulkarni commented Dec 15, 2017 reply Follow Share a) ans = 3 (count for individual attribute ignores NULL) b) ans = 5 (count for all table includes NULL) 4 votes 4 votes rohan mishra commented Dec 23, 2017 reply Follow Share Ya you are right. 0 votes 0 votes Please log in or register to add a comment.