在PHP中顯示重複的SQL列

Question

如何在列中顯示重複的姓氏？這是我迄今爲止的功能。

$query="SELECT first_name, last_name, suffix, city, state, birth, death from president WHERE COUNT last_name >'1' order by last_name;"; 

Answer 1

SELECT lastname, COUNT(*) 
FROM president 
GROUP BY lastname 
HAVING COUNT(*) > 1;