0 votes 0 votes which of the following is a unary operation? (a) intersection (b) projection (c) join (d) cartesian Product Databases databases relational-algebra + – mohit jain asked Jun 25, 2022 mohit jain 329 views answer comment Share Follow See all 0 reply Please log in or register to add a comment.
0 votes 0 votes Option (b) projection JAINchiNMay answered Jun 25, 2022 JAINchiNMay comment Share Follow See all 0 reply Please log in or register to add a comment.
0 votes 0 votes @mohit+jain (b) projection ….. The select, project, and rename operations are called unary operations, because they operate on one relation…. The other three operations i.e. join, Cartesian product and intersection operate on pairs of relations and are, therefore, called binary operations…. Example of unary operator: Π<company = “Google”>(Table_name) … Bikram 1 answered Jul 13, 2022 Bikram 1 comment Share Follow See all 0 reply Please log in or register to add a comment.