是什么导致＆＃34;不唯一的表/别名＆＃34;错误？

Question

数据库错误

  

错误：SQLSTATE [42000]：语法错误或访问冲突：1066不唯一的表/别名：＆＃39;漏斗＆＃39;

SQL Query: SELECT `funnel`.`id`
FROM `salescrm`.`funnel` AS `funnel`
LEFT JOIN `salescrm`.`funnel` AS `funnel` ON (`funnel`.`id` = `funnel`.`id`)
LEFT JOIN `salescrm`.`users` AS `User` ON (`funnel`.`user_id` = `User`.`id`) 
WHERE `funnel`.`id` = 2 LIMIT 1

  

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