0 votes 0 votes https://gateoverflow.in/1846/gate2006-68 I AM NOT GETTING THIS QUESTION CONCEPTS Databases databases + – Deepanshu asked Aug 15, 2018 • edited Jul 8, 2019 by Cristine Deepanshu 566 views answer comment Share Follow See all 11 Comments See all 11 11 Comments reply Show 8 previous comments Deepanshu commented Aug 15, 2018 reply Follow Share OK OK GOT IT. NOW BY THIS IT MEANS 1ST AND 3RD QUERY SAME AND 2ND AND 4TH ARE SAME 0 votes 0 votes Shaik Masthan commented Aug 15, 2018 reply Follow Share yes..... but there is a ambiguity in Option A and Option B due to identical row sets terms we clearly understand one of them will be the answer.... but which one is not known correctly... But my choice is go with option B 1 votes 1 votes Deepanshu commented Aug 15, 2018 reply Follow Share @Shaik Masthan THANKS BRO 0 votes 0 votes Please log in or register to add a comment.