隐藏 mySQL 中的重复条目

Question

我想做一个 mySQL 查询，它选择所有用户的信息（姓名、年龄、手机等），不包括“电子邮件”或“手机”上的重复项。

所以，我想避免为多次注册的用户显示重复条目。

我的查询：

$sql = "SELECT tet.id tet_id, tet.firstName tet_fristName, tet.lastName tet_lastName,tet.image tet_image,  
                        tet.url tet_url,tet.address tet_address,tet.job tet_job,tet.age tet_age,
                        tet.mobilePhone tet_mobilePhone, tet.homePhone tet_homePhone, tet.email tet_email,
                        tet.date_of_registration tet_date_of_registration, tet.player_id tet_player_id, 
                        app.value app_value, app.date app_date
                FROM `test_players` as tet
                LEFT JOIN approved_test_players as app on app.player_id=tet.id WHERE app.value IS NULL order by tet.id desc ";
$result = $conn->query($sql);

Answer 1

SELECT DISTINCT  tet.firstName as  tet_fristName, tet.lastName as  tet_lastName,tet.age as tet_age, tet.mobilePhone as tet_mobilePhone, tet.email as tet_email

 FROM `test_players` as tet 

JOIN approved_test_players as app 

ON app.player_id=tet.id 

WHERE app.value IS NULL 

order by tet.id desc 

试试这个

Answer 2

Select id
From table group by tel
Having count(user_id)>2