1 votes 1 votes Consider the following relational schema and instance R(A, B, C): what is the ans.please explain . ADITYA CHAURASIYA 5 asked Jan 4, 2018 ADITYA CHAURASIYA 5 315 views answer comment Share Follow See all 0 reply Please log in or register to add a comment.
1 votes 1 votes exist clause is used to test inner query is empty or not. if inner query is not empty then it execute successfully . in this question inner query have count(*) which is always true. so it return all tuples in the relation. total number of tuples =3 abhishekmehta4u answered Mar 29, 2018 abhishekmehta4u comment Share Follow See all 0 reply Please log in or register to add a comment.
