Question

我需要在联系人表格中列出所有重复的电话号码。

电话号码有两个字段：phone_mobile和phone_work

通讯录表

id | first_name | last_name | phone_mobile | phone_work

1  | Raghu       | Nath     | 8756123454   | 9976543120
2  | Sheryl      | John     | 9898765431   | 8765412901    
3  | Joseph      | Ovett    | 8756123454   | 0876451230    
4  | Sheryl      | John     | 9976543120   | NULL

我有查询在单列上查找重复项，例如我想在phone_mobile

上获得重复项

SQL：

SELECT contacts.id, 
       CONCAT(contacts.first_name," ",contacts.last_name) as full_name, 
       contacts.phone_mobile, contacts.phone_work 
FROM contacts 
INNER JOIN (
   SELECT first_name, phone_mobile, phone_work, count(*) as rows 
   FROM `contacts` 
   WHERE deleted = 0 
   GROUP BY phone_mobile 
   HAVING count(rows) > 1
) as p 
WHERE contacts.deleted=0 AND p.`phone_mobile` = contacts.`phone_mobile` AND contacts.`phone_mobile` != '' 
ORDER BY contacts.date_entered DESC, contacts.first_name, contacts.last_name;

然后返回以下输出：返回phone_mobile字段上的所有重复项。

id | first_name | last_name | phone_mobile | phone_work

1  | Raghu       | Nath     | 8756123454   | 9976543120
3  | Joseph      | Ovett    | 8756123454   | 0876451230

但如果我想在一个查询中同时在phone_mobile和phone_work上找到重复内容，我该如何修改我的查询？

我的输出应该变为：编号9976543120在id为1的phone_work中，在id为4的phone_mobile中

id | first_name | last_name | phone_mobile | phone_work

1  | Raghu       | Nath     | 8756123454   | 9976543120
3  | Joseph      | Ovett    | 8756123454   | 0876451230    
4  | Sheryl      | John     | 9976543120   | NULL

Answer 1

您可能首先来自phone_mobile和mobile_work列的UNION数据。然后在该数据中找到重复项。之后，您可以使用原始contacts表格加入重复的数字，以获得所需的结果，如下所示：

SELECT DISTINCT contacts.* FROM contacts
JOIN (
  SELECT phone FROM (
    SELECT phone_mobile AS phone FROM contacts
    UNION ALL
    SELECT phone_work AS phone FROM contacts
  ) t1
  GROUP BY phone
  HAVING count(phone) > 1
) t2
ON (contacts.phone_mobile = t2.phone OR contacts.phone_work = t2.phone)

小提琴演示：http://sqlfiddle.com/#!2/9bf58/8

此处最内层的表t1执行UNION，然后t2获取重复项，然后最外面的JOIN为您提供具有相同电话号码的联系人（在phone_mobile列或phone_work列中）。 / p>

Criss Cross重复搜索电话号码

1 个答案: