SQL错误：1066不是唯一的表/别名

Question

嗨，我坚持这个问题

SELECT c1.ID FROM cliente JOIN corsa AS c1 ON corsa.cliente_ID = cliente.ID_cliente, cliente JOIN corsa AS c2 ON corsa.cliente_ID = cliente.ID_cliente WHERE c1.tariffa = c2.tariffa AND c2.ID_cliente = 1 AND c2.data_corsa = "2012-06-20";

我收到错误1066而不是唯一的表/别名：'cliente'。 我理解在FROM语句中存在一个问题，我称之为'cliente'两次。我无法弄清楚如何让它发挥作用。

我试过这个

SELECT DISTINCT c1.* FROM cliente INNER JOIN corsa AS c1, cliente c2 INNER JOIN corsa AS c3 WHERE c1.tariffa = c3.tariffa AND c3.cliente_ID = 1 AND c3.data_corsa = "2012-06-20";

它似乎有效，但我不太确定。

由于