input: from typing import List
  
  
  def select_approved_rows(cur) -> List[str]:
      """Select all rows from a given table where the 'status' is 'approved'.
      >>> select_approved_rows(MockCursor())  # assuming MockCursor has a method fetchall() which returns [('row1', 'approved'), ('row2', 'approved')]
      [('row1', 'approved'), ('row2', 'approved')]
      >>> select_approved_rows(MockCursor())  # assuming MockCursor has a method fetchall() which returns []
      []
      """
      sql = "SELECT * FROM table WHERE status = 'approved'"
      cur.execute(sql)
      return cur.fetchall()
output:     sql = "SELECT * FROM table WHERE status = 'approved'"
      cur.execute(sql)
      return cur.fetchall()