MySQL 查询不显示重复的 id

Question

如果我的查询中的重复 id_customer 是，

，我想不显示

SELECT
    ps_orders.id_customer,
    ps_customer.firstname,
    ps_customer.lastname,
    ps_customer.email,
    ps_orders.total_paid
FROM
    ps_orders
    RIGHT JOIN ps_customer 
        on ps_orders.id_customer = ps_customer.id_customer
WHERE
    ps_orders.total_paid > 1
GROUP BY
    ps_orders.id_customer;

我正在使用 "group by" 但它没有显示。我希望它不会显示任何内容，即使是

组

这样显示

 id_customer    firstname   lastname    email   total_paid
--------------------------------------------------------
55  name8   name10  ***@windowslive.com 88.90
58  name6   name7   ****@hotmail.com    78.90
59  name3   name5   ****@hotmail.com    123.83
60  name    name2   ****@hotmail.com    78.90

第一次查询是这样的，

SELECT
    ps_orders.id_customer,
    ps_customer.firstname,
    ps_customer.lastname,
    ps_customer.email,
    ps_orders.total_paid
FROM
    ps_orders
    RIGHT JOIN ps_customer 
        on ps_orders.id_customer = ps_customer.id_customer
WHERE
    ps_orders.total_paid > 1
ORDER BY
    ps_orders.id_customer;

没有分组依据

 id_customer    firstname   lastname    email   total_paid
--------------------------------------------------------
55  name8   name10  ***@windowslive.com 88.90
58  name6   name7   ****@hotmail.com    56.00
58  name6   name7   ****@hotmail.com    87.90
58  name6   name7   ****@hotmail.com    79.99
58  name6   name7   ****@hotmail.com    78.90
59  name3   name5   ****@hotmail.com    123.83
60  name    name2   ****@hotmail.com    78.90

但我想这样看

 id_customer    firstname   lastname    email   total_paid
--------------------------------------------------------
55  name8   name10  ***@windowslive.com 88.90
59  name3   name5   ****@hotmail.com    123.83
60  name    name2   ****@hotmail.com    78.90

Answer 1

您需要检查 HAVING:

http://sqlfiddle.com/#!9/a981f/1

SELECT
    ps_orders.id_customer,
    ps_customer.firstname,
    ps_customer.lastname,
    ps_customer.email,
    ps_orders.total_paid
FROM
    ps_orders
    RIGHT JOIN ps_customer 
        on ps_orders.id_customer = ps_customer.id_customer
GROUP BY
    ps_orders.id_customer
HAVING COUNT(*)=1

Answer 2

试试这个：

SELECT
    ps_orders.id_customer,
    ps_customer.firstname,
    ps_customer.lastname,
    ps_customer.email,
    ps_orders.total_paid
FROM
    ps_orders
    JOIN ps_customer 
        on ps_orders.id_customer = ps_customer.id_customer
WHERE
    ps_orders.total_paid > 1
    AND ps_orders.id_customer IN (  SELECT  ps_orders.id_customer
                                    FROM    ps_orders
                                    GROUP BY ps_orders.id_customer
                                    HAVING COUNT(1) < 2 )

MySQL 查询不显示重复的 id

MySQL Query Not show duplicate id

mysql

sql

prestashop-1.6