1 votes 1 votes If 5 relations are put through the zig-zag configuration of join tree and the order of join does not matter, how many different join trees are possible? 1. 960 2. 840 3. 1024 4. 512 Databases nptel-quiz databases + – gulsanchouhan asked Aug 26, 2017 gulsanchouhan 518 views answer comment Share Follow See all 0 reply Please log in or register to add a comment.
0 votes 0 votes 960. we can use this formula n!(2power n-2). Nagamani Chippada answered Sep 4, 2017 Nagamani Chippada comment Share Follow See 1 comment See all 1 1 comment reply Kaluti commented Sep 17, 2017 reply Follow Share can u explain this formula how has it come? 0 votes 0 votes Please log in or register to add a comment.