Mysql 使用'DISTINCT'关键字时出错？

请看下面的查询

SELECT Client_Portfolio.*,
DISTINCT Client.Name AS "Client Name", 
Portfolio.Portfolio_Type 
FROM Client_Portfolio 
INNER JOIN Client ON Client.idClient = Client_Portfolio.idClient 
INNER JOIN Portfolio ON Portfolio.idPortfolio = Client_Portfolio.idPortfolio 
WHERE Portfolio.Portfolio_Type = "Out"

我想删除与“客户端名称”重复的记录，所以我使用了关键字

distinct

。但它给出了以下错误

#1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'distinct (Client.Name) AS "Client Name",
Portfolio.Portfolio_Type
FROM Client_' at line 2 

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我做错了什么？

选择不同的的语法就是，

选择不同的

：

SELECT DISTINCT cp.*, c.Name AS "Client Name", p.Portfolio_Type 
FROM Client_Portfolio cp INNER JOIN
     Client cp
     ON c.idClient = cp.idClient INNER JOIN
     Portfolio
     ON p.idPortfolio = cp.idPortfolio 
WHERE p.Portfolio_Type = 'Out';

它适用于

select

列表中的所有列

我不知道这是否是你想要的，但这是正确的语法

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注意，我对您的查询做了另外两个更改。首先，我添加了表别名以使查询更易于编写和读取。其次，我将字符串常量放在单引号中，而不是双引号中。

put

DISTINCT

after

SELECT DISTINCT