رسم نمودار ER - Music collection

Описание: سلام به همه ی دوستان عزیز . امروز میخوام یک مثال دیگه از نمودار
ER - Entity Relation model
براتون رسم کنم که مخصوص پایگاه داده ی یک مجموعه آهنگ هست

زمان بندی ویدئو
00:00 مقدمه
00:28 بیان نیازمندی ها
02:16 رسم نمودار ER
06:43 یک نکته ی تجربی مهم
09:01 درجه ی روابط

نیازمندی ها به شرح زیر هست

Design an ER model for a music collection with below requirements:
The collection consists of albums.
An album is made by exactly one artist.
An artist makes one or more albums.
An album contains one or more tracks
Artists, albums, and tracks each have a name.
Each track is on exactly one album.
Each track has a time length, measured in seconds.
When a track is played, the date and time the playback began (to the nearest second) should be recorded; this is used for reporting when a track was last played, as well as the number of times music by an artist, from an album, or a track has been played.

مثال های دیگر از نمودار ER
National Hockey Team: (تیم ملی هاکی)
   • رسم مثالی از نمودار ER - تیم ملی هاکی