如何在表中查找重复的名称

I have a table having person names address and job title. the names are repeating sometimes. I have to compare if two people have the same name and same address than i have to keep only 1 record of them.

我有一张有人名地址和职称的表。名字有时会重复。我必须比较两个人是否有相同的名字和相同的地址,而不是只保留1个记录。

Table: Data_Excel
Name: P_Name
Address: P_Address
City:  P_city

2 个解决方案

#1

To find the duplicates you can do:

要查找重复项,您可以执行以下操作:

SELECT P_name,
  P_Address,
  P_city
FROM Data_Excel
GROUP BY P_Name,
  P_Address,
  P_city
HAVING COUNT(*) > 1;

To remove duplicates you could do:

要删除重复项,您可以执行以下操作:

DELETE
FROM Data_Excel
WHERE rowid NOT IN (
    SELECT MIN(rowid)
    FROM Data_Excel
    GROUP BY P_Name,
      P_Address,
      P_city
    );

To Insert in Person table you would do:

要插入人员表,您将执行以下操作:

INSERT INTO Person(id,name)
SELECT (SELECT MAX(id)+1 FROM Person),P_Name 
FROM Data_Excel WHERE P_Name NOT IN (SELECT name FROM Person)

#2

SELECT P_Name,P_Address,count(*)
FROM Data_Excel
GROUP BY P_Name,P_Address
HAVING count(*) > 1;

This will give you the records with same P_Name & P_Address.

这将为您提供具有相同P_Name和P_Address的记录。

#1