DBMS - ER diagrams

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DBMS - ER diagrams

luxaraomesh

image luxara.png

i have a question on relational schema - ER diagrams
#when we write relational schema,if there is a descriptive attribute or many to many relationship, should be written in a separate table as per rule
#but if both many to many relationship and descriptive attribute combined together? i mean if there is a many to many relationship with a descriptive attribute ...

#once we wrote a separate table for descriptive attribute as per rule , do we need to launch another table for the relationship since its many to many ?