mysql - 查询错误 (1066) : Not unique table/alias: '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，针对电子邮件，我想从用户帐户中获取余额和帐户 ID，其中帐户 ID 是外键。针对该外键，我想要表帐户中的 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` 

错误为#1066 - 不唯一的表/别名:useraccounts enter image description here

Answer 1

“你能更正这个查询吗” - 也许是这个

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`