I have a set of audio files with names GreenLine1.mp3, GreenLine2.mp3 e.t.c. I'm going to write them into a table as BLOB (I use MS SQL Server'08), here's my sql request:
DECLARE @aud AS VARBINARY(MAX)
DECLARE @num AS INT
-- Load the audio data
SET @num=1
WHILE (@num<38)
BEGIN;
SELECT @aud = CAST(bulkcolumn AS VARBINARY(MAX))
FROM OPENROWSET(
BULK
'C:\Users\Ilya\folder\GreenLine' + CAST(@num AS VARCHAR) + '.mp3',
SINGLE_BLOB ) AS x
-- Insert the data to the table
INSERT INTO Mb2.dbo.Audios (Id, [Content])
SELECT NEWID(), @aud
SET @num = @num + 1
END;
I have an error: Incorrect syntax near '+', expecting ',' or ')'.
If I try to write
'C:\Users\Ilya\folder\GreenLine' + CAST(@num AS VARCHAR) + '.mp3'
into a variable and put it after BULK, I get Incorrect syntax near @variable, expected STRING, or TEXT_LEX
You can't parametrise or concatenate the parameters of OPENROWSET. It is constant values only.
You'll have to use dynamic SQL and a temp table, or consider using SSIS for example
This article pointed me in the right direction when I had the same issue with OPENQUERY:
Basically, you can wrap the entire statement in a variable (nvarchar), including the openrowset, and run exec sp_executesql @sql. It gets a little ugly to read around the 's though, because you'll have to escape them with ''.
来源：https://stackoverflow.com/questions/6621579/t-sql-issue-with-string-concat