sql server - How to prevent SQL injection in dynamic sql for bulk insert? -

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i'm using dynamic sql bulk insert parameter (bulk insert using stored procedure).

declare @sql nvarchar(4000) = 'bulk insert tblvalues ''' + @filename + ''' ( fieldterminator ='','', rowterminator =''\n'' )'; exec(@sql);

but... how avoid sql injection?

you use quotename surround file name in single quotes:

declare @sql nvarchar(4000) = 'bulk insert tblvalues ' + quotename(@filename,'''') + ' ( fieldterminator ='','', rowterminator =''\n'' )'; exec (@sql);




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