1 votes 1 votes Each Department is required to have atmost one employee as manager My interpretation is for Department : Cardinality=1 Particiaption=0 for Employee Cardinality=1 and Participation is what? (1 or 0) Are they correct ? Databases er-diagram er-to-relational + – Salazar asked Dec 27, 2017 retagged Jun 20, 2019 by Cristine Salazar 338 views answer comment Share Follow See all 4 Comments See all 4 4 Comments reply Ashwin Kulkarni commented Dec 27, 2017 reply Follow Share you cannot directly interpret anything from this information, But if you want to conclude, Then each dept have at least one manager (They haven't said at least one employee) so cardinality of dept is : N, participation can be 0 Each emp has to participate in at least and atmost 1 dept. Hence emp cardinality and participation = 1 1 votes 1 votes Salazar commented Dec 27, 2017 reply Follow Share how can cardinality of dept be N, it is mentioned each department is required to have atmost one manager" so each department can participate with one employee at max, then cardinality has to be 1 right ? 0 votes 0 votes Ashwin Kulkarni commented Dec 27, 2017 reply Follow Share They said at most one manager, not at most one employee. (I have interpreted this way) I mean a dept has many employees among them 1 will be manager. (this statement makes sense) 2 votes 2 votes Salazar commented Dec 28, 2017 reply Follow Share @ashwin, one more thing if i have two entities one being STRONG say Person and other being WEAK say License then License will be on total participation.then cardinality and participation of License are 1 ;; and for Person participation =0 and cardinality is 1 are above statements correct ? 0 votes 0 votes Please log in or register to add a comment.