必须为表中的标识列指定显式值

Question

在 sql 查询编辑器中，我有以下命令：

SET IDENTITY_INSERT tUserPreference ON

BULK INSERT tUserPreference
FROM 'D:\test.txt'
WITH
(   KEEPIDENTITY,
    BATCHSIZE = 2,
    FIRSTROW = 2,
    FIELDTERMINATOR = ',' ,
    ROWTERMINATOR = '\n',
    DATAFILETYPE = 'char',
    KEEPNULLS
    );
SET IDENTITY_INSERT tUserPreference OFF
GO

test.txt 的内容：

"UserPreferenceId","UserId","UserPreferenceValue","UserPreferenceTypeId"
7858,1194,"FSP,FRB,FWF,FBVS,FRRC",15
7859,1194,"FIRM",21
7860,1194,"009,61,114,142,174,233,262,286,303,325,369,389,411,671,690,735,938,943,977,105,200",11
7861,1194,"B545,B441",12
7862,1194,"{"FIRM":{"accountType":"Firm","timeInForce":"DAY","routing":"DNR","isAllOrNone":false}}",2

但是当我执行这些命令时，我看到以下结果：

Bulk load data conversion error (type mismatch or invalid character for the specified codepage) for row 2, column 4 (UserPreferenceTypeId).
Msg 2627, Level 14, State 1, Line 3
Violation of PRIMARY KEY constraint 'PK_tUserPreference_UserPreferenceId'. Cannot insert duplicate key in object 'dbo.tUserPreference'. The duplicate key value is (7859).
The statement has been terminated.

并且只有 1 行插入 (7861,1194,"B545,B441",12)

表创建脚本：

CREATE TABLE [dbo].[tUserPreference](
    [UserPreferenceId] [int] IDENTITY(1,1) NOT NULL,
    [UserId] [int] NULL,
    [UserPreferenceValue] [varchar](max) NULL,
    [UserPreferenceTypeId] [int] NOT NULL,
 CONSTRAINT [PK_tUserPreference_UserPreferenceId] PRIMARY KEY CLUSTERED 
....

如何正确使用bulk Insert插入？

Answer 1

CREATE TABLE tUserPreference1 (DataField VARCHAR(1000))

BULK INSERT tUserPreference1
FROM 'C:\Shared\text.txt'
WITH
(   
    FIRSTROW = 2,
    ROWTERMINATOR = '\n',
    DATAFILETYPE = 'char',
    KEEPNULLS
    );

select  SUBSTRING(DataField,1,4)    AS UserPreferenceId
        ,SUBSTRING(DataField,6,4)   AS UserId
        ,REVERSE(SUBSTRING(REVERSE(DataField),1,CHARINDEX(',',REVERSE(DataField))-1))   UserPreferenceTypeId
        ,DataField
INTO    tUserPreference2
from    tUserPreference1

SELECT  *
        ,SUBSTRING(DataField,11,LEN(DataField)-(11+LEN(UserPreferenceTypeId))) AS UserPreferenceValue
FROM    tUserPreference2