将数据从一个 table 传输到另一个相同的 table

Question

SET IDENTITY_INSERT [db1].[dbo].Subscriber ON

INSERT INTO [db1].[dbo].Subscriber
    SELECT * FROM [db2].[dbo].SubScriber

PRINT 'Successfully Re-imported data from SubScriber backup'

SET IDENTITY_INSERT [db1].[dbo].Subscriber OFF

我想要的只是一种从一个 table 复制数据的动态方法，该 table 与另一个数据库中的另一个 table 具有相同的设置，但我仍然收到此错误：

An explicit value for the identity column in table 'db1.dbo.MsSubProject' can only be specified when a column list is used and IDENTITY_INSERT is ON.

我已经明确地将 IDENTITY_INSERT 设置为 ON。另外，即使我尝试像这样显式写出 table 列：

SET IDENTITY_INSERT [db1].[dbo].Subscriber ON

INSERT INTO [db1].[dbo].Subscriber (SubscriberGUID, ItemGUID_Entity, SubscriberID, SubscriberRegionID, SubscriberTypeID, ID, SubscriberNameFull, SubscriberEmail, SubscriberLogin, SubscriberPassword, Active, DateCreated, DateDeleted)
    SELECT * FROM [db2].[dbo].SubScriber

PRINT 'Successfully Re-imported data from SubScriber backup'

SET IDENTITY_INSERT [db1].[dbo].MsSubscriber OFF

这也行不通...

我做错了什么？我在 Whosebug 上找到的针对此特定问题的每个解决方案都不适合我。

Answer 1

您应该也养成在SELECT 语句中使用显式列列表 的习惯！ SELECT * 可以在 SSMS 中查询临时样式 - 但它应该禁止在任何生产代码中使用！

试试这个：

SET IDENTITY_INSERT [db1].[dbo].Subscriber ON

INSERT INTO [db1].[dbo].Subscriber (SubscriberGUID, ItemGUID_Entity, SubscriberID, SubscriberRegionID, SubscriberTypeID, ID, SubscriberNameFull, SubscriberEmail, SubscriberLogin, SubscriberPassword, Active, DateCreated, DateDeleted)
    SELECT 
        SubscriberGUID, ItemGUID_Entity, SubscriberID, SubscriberRegionID, 
        SubscriberTypeID, ID, SubscriberNameFull, SubscriberEmail, 
        SubscriberLogin, SubscriberPassword, Active, DateCreated, DateDeleted
    FROM [db2].[dbo].SubScriber

PRINT 'Successfully Re-imported data from SubScriber backup'

SET IDENTITY_INSERT [db1].[dbo].MsSubscriber OFF

Answer 2

如果您真的不想写列列表，您可以使用动态SQL

DECLARE @cols1 nvarchar(max), @cols2 nvarchar(max);

SELECT
    @cols1 = STRING_AGG(QUOTENAME(c1.name, ',')) WITHIN GROUP (ORDER BY c1.name),
    @cols2 = STRING_AGG(QUOTENAME(c2.name, ',')) WITHIN GROUP (ORDER BY c1.name) -- same order
FROM db1.sys.columns c1
JOIN db2.sys.columns c2
WHERE c1.object_id = OBJECT_ID(N'[db1].[dbo].Subscriber')
  AND c2.object_id = OBJECT_ID(N'[db2].[dbo].Subscriber');

DECLARE @sql nvarchar(max) = N'
SET IDENTITY_INSERT [db1].[dbo].Subscriber ON;

INSERT INTO [db1].[dbo].Subscriber
(' + @cols1 + N')
    SELECT 
        ' + @cols2 + N'
    FROM [db2].[dbo].SubScriber;

PRINT ''Successfully Re-imported data from SubScriber backup'';

SET IDENTITY_INSERT [db1].[dbo].Subscriber OFF;
';

EXEC sp_executesql @sql;

将数据从一个 table 传输到另一个相同的 table

Transfer data from one table to another identical table

sql

sql-server

stored-procedures