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psycopg2 sql.SQL how to implement timestamp > now() - INTERVAL '8 days'?

Needed to select records newer, than 8 days from several tables

This is not working :(

    self._getRawData = sql.SQL("SELECT * FROM {} WRERE {} > NOW() - INTERVAL {}")
    ...
    cur = self._conn.cursor()
    cur.execute(self._getRawData.format(sql.Identifier('MyTS.MyTable'), 
                                        sql.Identifier('Timestamp'), 
                                        sql.Identifier('8 days')))

psycopg2.errors.SyntaxError: syntax error at or near ""Timestamp""

Below is working OK, but I want 2 implement sql.SQL for several tables - any advice?

    statement = "SELECT * FROM "MyTS"."MyTable" WHERE "Timestamp" > NOW() - INTERVAL                 '8 days'"
    cur = self._conn.cursor()
    cur.execute(statement)

UPD ! Solved! Thabks 4 the advice in comments!

    self._getRawData = sql.SQL("SELECT * FROM {}.{} WHERE {} > NOW() - INTERVAL {}")
    ...
    sql.Literal('8 days')))

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