Database Management Systems, hyunja Lee11 Participation Constraints v Does every department have a manager? – If so, this is a participation constrain
{"Image DocumentName": "Participation Constraints", "Image ImageDescription": "Does every department have a manager? If so, this is a participation constraint: the participation of Departments in Manages is said to be total (vs. partial). Total participation is represented in thick (double) line. Every did value in Departments table must appear in a row of the Manages table (with a non-null ssn value!) since. since. name. name. dname. dname. ssn. lot. did. did. budget. budget. Employees. Manages. Departments. Works_In. 8.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}