Openrowset bulk insert on a specific row - sql-server

Question

I am new to SQL, but am trying to learn its logic, I am assuming bulk insert will insert on all rows in this case a blob. (pdf file) below is my code but what I am trying to accomplish is, inserting a pdf file that I have put on SQL server in a row that has a matching Primary Key that I specify. So far I am missing the where clause to specify the PK
Declare #sql varchar(max)
Declare #filePath varchar(max)
Set #filePath = 'C:\iphone.pdf'
Set #sql='INSERT INTO HDData.dbo.PurchasedCellPhoneInfo(Receipt) SELECT * FROM OPENROWSET(BULK '''+ #filePath+''', SINGLE_BLOB) AS BLOB'
exec(#sql)
May I use an update t-SQL query instead of insert? and how would I drop the where to specify a specific row I want to insert this blob in?
Any help would be appreciated.
I also have tried this, following #misterPositive's suggestion for update query:
Declare #criteria varchar(50)
SET #criteria ='352014075399147'
UPDATE HDData.dbo.PurchasedCellPhoneInfo SET Receipt =
(SELECT Receipt FROM OPENROWSET (BULK 'C:\352014075399147.pdf, SINGLE_BLOB') a)
WHERE(IMEI = #criteria)
i do recieve this message:
Either a format file or one of the three options SINGLE_BLOB, SINGLE_CLOB, or SINGLE_NCLOB must be specified. i like this update query as it seems to fit what im trying to do.

Answer 1

You can do this to UPDATE:
UPDATE MyTable
SET blobField =
(SELECT BulkColumn FROM OPENROWSET (BULK 'C:\Test\Test1.pdf', SINGLE_BLOB) a)
WHERE (CriteriaField = #criteria)
Here is another way for PK
CREATE VIEW [dbo].[VWWorkDataLoad]
AS
SELECT RecordLine
FROM [dbo].[WorkDataLoad];
Now BULK INSERT should then look like:
BULK INSERT [dbo].[VWWorkDataLoad] FROM 'D:\NPfiles\TS082114.trn'
WITH (FIRSTROW = 2,FIELDTERMINATOR = ',' , ROWTERMINATOR = '\n');

Answer 2

If you want to insert new records then you could have an identity column for your PK and not have to worry about it. I have also seen functions used when a table is designed without identity on PK. Something like GetTableNamePK() in the select list.
If you want to update an existing record then you will want a where clause as you mentioned. This worked for me in testing:
Update TestBlob Set BinaryData = (SELECT * FROM OPENROWSET(BULK 'c:\temp\test.pdf', SINGLE_BLOB) AS BLOB)
Where ID = 2
If you do not want to use the Identity or Function this worked where ID is a primary key and I want to insert the BLOB with PK of 3:
INSERT INTO TestBlob2 (ID, BinaryData) SELECT 3, * FROM OPENROWSET(BULK 'c:\temp\test.pdf', SINGLE_BLOB) AS BLOB