SQL Server-在表中查找重复项

我们有一张近1亿行的大桌子。是否有人可以帮助查找表中的重复数据并将其移动到存档

表名：CustomerData
字段数：10

最新的一个应保留（该记录中提到的结束日期为空）

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关于

您只需要移动结束日期不为空的行

在单个交易中：

INSERT INTO archive (column1, column2, ... column10)
SELECT column1, column2, ..., column10
FROM CustomerData
WHERE END_DATE IS NOT NULL

DELETE CustomerData
WHERE END_DATE IS NOT NULL

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假设CustomerData表结构为： CustomerDAta（客户id、客户名称、地址id、开始时间、结束日期等7列）

假设两个客户具有相同的地址ID，则可以获得重复的地址ID

插入到存档表中：-

INSERT INTO archive (column1, column2, ... column10)
SELECT cust_id, start_Date, ...,End_Date
FROM CustomerData
WHERE END_DATE IS NOT NULL 
AND Address_ID IN(
        SELECT Address_ID FROM
            (
            SELECT Address(ID),count(Address_ID)
            FROM customerDAta
            GROUP BY Address_ID
            HAVING count(Adddress_ID)>1
            )
        )                       
                        )

DELETE CustomerData
WHERE END_DATE IS NOT NULL
    AND
    Address_ID IN(
            SELECT Address_ID FROM
            (
            SELECT Address(ID),count(Address_ID)
            FROM customerDAta
            GROUP BY Address_ID
            HAVING count(Adddress_ID)>1
            )
        )

从以下位置删除：-CustomerDAt表：-

INSERT INTO archive (column1, column2, ... column10)
SELECT cust_id, start_Date, ...,End_Date
FROM CustomerData
WHERE END_DATE IS NOT NULL 
AND Address_ID IN(
        SELECT Address_ID FROM
            (
            SELECT Address(ID),count(Address_ID)
            FROM customerDAta
            GROUP BY Address_ID
            HAVING count(Adddress_ID)>1
            )
        )                       
                        )

DELETE CustomerData
WHERE END_DATE IS NOT NULL
    AND
    Address_ID IN(
            SELECT Address_ID FROM
            (
            SELECT Address(ID),count(Address_ID)
            FROM customerDAta
            GROUP BY Address_ID
            HAVING count(Adddress_ID)>1
            )
        )

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用于根据与oracle数据库提供的employees表中的DeptID列类似的相同地址ID列提取重复项的内部子查询。

定义重复项。所有列的值是否相同？