查询错误（1066）：不是唯一的表/别名：'useraccounts'

Question

我想从用户表中获取电子邮件和密码，其中电子邮件是主键，而针对电子邮件，我想从用户ID中获得余额和AccountID，而帐户ID是外键。并针对该外键，我想要表格帐户中的accountNo

SELECT `user`.`email`, `user`.`passwrd`, `useraccounts`.`Balance`, `useraccounts`.`AccountID`, `accounts`.`AccountNo`
FROM `user` , `accounts`
LEFT JOIN `useraccounts` ON `user`.`email` = `useraccounts`.`email` 
LEFT JOIN `useraccounts` ON `accounts`.`AccountID` = `useraccounts`.`AccountID` 

SELECT `user`.`email`, `user`.`passwrd`, `useraccounts`.`Balance`, `useraccounts`.`AccountID`, `accounts`.`AccountNo`
FROM `user` , `accounts`
LEFT JOIN `useraccounts` ON `user`.`email` = `useraccounts`.`email` 
LEFT JOIN `useraccounts` ON `accounts`.`AccountID` = `useraccounts`.`AccountID` 

错误是＃1066-不是唯一的表/别名：useraccounts enter image description here

Answer 1

“您可以更正此查询吗？”-也许

SELECT `user`.`email`, `user`.`passwrd`, `useraccounts`.`Balance`, `useraccounts`.`AccountID`, `accounts`.`AccountNo`
FROM `user` 
LEFT JOIN `useraccounts` ON `user`.`email` = `useraccounts`.`email` 
LEFT JOIN `accounts` ON `accounts`.`AccountID` = `useraccounts`.`AccountID`