重置主键而不删除截断表 [英] Resetting Primary key without deleting truncating table

问题描述

我有一个带有主键的表，现在没有任何原因我不知道我什么时候插入数据它正在像这样加载

I have a table with a primary key, now without any reason I don't know when I am inserting data it is being loaded like this

Pk_Col Some_Other_Col
1           A
2           B
3           C
1002        D
1003        E
1901        F

有什么办法可以像下面那样重置我的表格，而不删除/截断表格?

Is there any way I can reset my table like below, without deleting/ truncating the table?

Pk_Col Some_Other_Col
1           A
2           B
3           C
4           D
5           E
6           F

推荐答案

您无法更新 IDENTITY 列，因此 DELETE/INSERT 是唯一的方法.您可以重新设定 IDENTITY 列并重新创建数据，如下所示:

You can't update the IDENTITY column so DELETE/INSERT is the only way. You can reseed the IDENTITY column and recreate the data, like this:

DBCC CHECKIDENT ('dbo.tbl',RESEED,0);    
INSERT INTO dbo.tbl (Some_Other_Col)
SELECT Some_Other_Col
FROM (DELETE FROM tbl OUTPUT deleted.*) d;

假设没有引用此数据的外键.

That assumes there are no foreign keys referencing this data.

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