edited by
359 views

1 Answer

0 votes
0 votes
In query 1 if condition matches  then "where not exit " return false and if condition does not matches then it return true and print all attribute so both query Q1, Q2 is returning  all student who never got grade above 4.

Related questions

3 votes
3 votes
1 answer
1
0 votes
0 votes
0 answers
2
0 votes
0 votes
2 answers
3
Arnabi asked Jan 28, 2017
374 views
1 votes
1 votes
1 answer
4
Jason_Roy asked Jan 21, 2017
395 views
Correct Ans and how?