How can I define a composite primary key in SQL?

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How can I define a composite primary key consisting of two fields in SQL?

I want to make a table name voting with fields QuestionID, MemberID, and vote. And the Composite primary key consists of the fields QuestionID and MemberID.

How should I do this?

sql primary-key composite-primary-key

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How can I define a composite primary key in SQL?

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