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[英]Entity Framework error: Cannot insert explicit value for identity column in table
[英]Explicit value for the identity column in table error?
我收到以下錯誤消息,我已經調試了兩個身份插入,並且它們執行都沒有問題。 以前有人遇到過此錯誤嗎?有人知道如何解決此問題嗎?
信息8101,第16級,狀態1,第1行
僅當使用列列表且IDENTITY_INSERT為ON時,才能為表'c365online_script1.dbo.tProperty'中的identity列指定一個顯式值。
碼:
declare @Source_Database_Name varchar(255) = 'Production2';
declare @Destination_Database_Name varchar(255) = 'c365online_script1';
declare @Company_Id int = 1 --declare a companyid
CREATE TABLE #CompanyID (ID bigint)
INSERT INTO #CompanyID(ID)
VALUES('15')
-- Copy over company records from tCompanytable
--FIRST CURSOR LOOP THROUGH THIS TABLE
CREATE TABLE #TableList (
processorder int,
tablename NVARCHAR(100)
)
INSERT INTO #TableList (processorder, tablename )
VALUES
(1, 'tProperty');
DECLARE @Counter INT = 0 -- counting variable
----------- Cursor specific code starts here ------------
-- company cursor
declare copyCompanyDataCursor CURSOR fast_forward FOR
SELECT ID from #CompanyID;
open copyCompanyDataCursor
fetch next from copyCompanyDataCursor into @Company_Id;
WHILE @@FETCH_STATUS = 0
BEGIN
declare @processorder int;
declare @tablename varchar(500);
-- table cursor
declare copyTableDataCursor CURSOR fast_forward FOR
SELECT processorder,tablename from #TableList order by processorder;
open copyTableDataCursor
fetch next from copyTableDataCursor into @processorder, @tablename;
while @@FETCH_STATUS = 0
BEGIN
SET IDENTITY_INSERT [c365online_script1].[dbo].[tCompany] ON
-- Does the table have a companyID column? if statement checking for company id
IF EXISTS(SELECT * FROM Production2.INFORMATION_SCHEMA.COLUMNS WHERE COLUMN_NAME='CompanyID' and TABLE_NAME=@tablename)
BEGIN
if @Counter <= 0 -- make sure loop executes only once.
BEGIN
declare @debug varchar(max)
SET @debug = 'INSERT INTO ' + @Destination_Database_Name + '.dbo.' + @tablename + ' SELECT * FROM ' + @Source_Database_Name + '.dbo.' + @tablename + ' WHERE ' + @Source_Database_Name + '.dbo.' + @tablename + '.CompanyID = ' + CAST(@Company_Id as varchar(10))
print @debug
set @Counter = 1
EXEC(@debug)
--EXEC('INSERT INTO ' + @Destination_Database_Name + '.dbo.' + @tablename + ' SELECT * FROM ' + @Source_Database_Name + '.dbo.' + @tablename + ' WHERE ' + @Source_Database_Name + '.dbo.' + @tablename + '.CompanyID = ' + @Company_Id )
END
END
ELSE
BEGIN
Print 'No'
END
-- if yes then copy data based on companyID in cursor
-- if no check if this is the first time through company loop and copy all data
-- if @firstloop company exists look at information schema
--EXEC('INSERT INTO ' + @Destination_Database_Name + '.dbo.' + @tablename + ' SELECT * FROM ' + @Source_Database_Name + '.dbo.' + @tablename )
-- company logic
SET IDENTITY_INSERT [c365online_script1].[dbo].[tCompany] OFF
FETCH NEXT FROM copyTableDataCursor into @processorder,@tablename;
END
close copyTableDataCursor;
Deallocate copyTableDataCursor;
--INSERT INTO c365online_script1.dbo.tCompany
--SELECT *
--FROM production2.tCompany
--WHERE ISNULL(CompanyID, 0) = 0 -- copy all data where id is equal to zero
--@Destination_Database_Name
--
--EXEC(INSERT + @Destination_Database_Name + '.dbo.' + @tablename + ' SELECT * FROM ' + @Source_Database_Name + '.dbo.' + @tablename + ' WHERE ' + @Source_Database_Name + '.dbo.' + @tablename + '.CompanyID = ' + @Company_Id + ')')
--SET @firstLoop = false;
FETCH NEXT FROM copyCompanyDataCursor into @Company_Id;
END
CLOSE copyCompanyDataCursor;
DEALLOCATE copyCompanyDataCursor;
--Cleanup
DROP TABLE #CompanyID
DROP TABLE #TableList
好吧,錯誤說明了一切:
僅當使用列列表且IDENTITY_INSERT為ON 時,才能為表'c365online_script1.dbo.tProperty'中的identity列指定一個顯式值。
因此,您的INSERT
語句必須使用列列表!
采用
INSERT INTO dbo.Table(col1, col2, ...., colN) VALUES(Val1, val2, ...., ValN)
而不僅僅是
INSERT INTO dbo.Table VALUES(Val1, val2, ...., ValN)
^^^^ no column list defined!!
這樣就可以了!
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