Crow’s Foot Notation is the most popular notion used to draw Database Modelling Diagram such as Entity Relationship Diagram (ERD) or Enhanced Entity Relationship Diagram (EERD).

Note:
1.Participation/ Association:
-The line that connects two entities denotes the participation/ association of two entities
-The participation can be denoted as identified by line or unidentified by dash line
2.Cardinally
-It is the relation 1:M M:1 or M:N between entities