Should I create a ID column for the Briding table or not?

I am creating a Briding table between two tables with a many-to-many relationship.

The columns which I am including are:

ID from table 1.
ID from table 2.

Should I create a ID column for the Briding table or not?
Mr_ShawAsked:
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Pratima PharandeCommented:
no need of ID column for the Briding table

as  ID from table 1 and ID from table 2 will work as primary key
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Mr_ShawAuthor Commented:
thanks
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Microsoft SQL Server 2008

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