Select 除了 JOIN MySQL 中的元素

Question

我这里有加入两个表的代码。 但是我不想从 Accounts 数据库中获取密码元素。 我怎么能这样做？

"SELECT f.*, a.* 
   FROM Following as f 
   JOIN Accounts as a on f.followingUserID = a.id 
  WHERE `followingUserID` = '$acID'

Answer 1

“除...之外的所有列”没有 SQL 约定——要么全部，要么您手动定义列表：

SELECT f.*, 
       a.col1, a.col2,
       a.`col name using spaces not good`
  FROM FOLLOWING as f 
  JOIN ACCOUNTS as a on f.followingUserID = a.id 
 WHERE f.followingUserID = '$acID'

Answer 2

命名列而不是全部检索它们。

代替。*， ：

a.ColumnName1、a.ColumnName2 等......

Answer 3

如果您不想 select 密码元素，则需要将a.*更改为 select 每列单独，即

SELECT f.*, a.account_id, a.name 
FROM following as f 
JOIN accounts as a on f.followingUserId = a.id 
WHERE followingUserID = '$acID'