It exports Binary Data – which means things like Images, Documents and other media – which have been stored in a relational database. It exports them out to the file system.
There’s not much to configure – you need to decide which column(s) you are going to export to the file system, and which column you will use to specify the full file path and file name (you cannot just set a folder globally and use a file name only). MSDN shows the full range of outcomes if you set the Allow Append or Force Truncate flags, but essentially:
Allow Append – Will create a new file if none exists, otherwise it will add the data to the end of an existing file
Force Truncate – If a file exists, it will overwrite it
The other thing to note is that this component can be the terminating point of a data flow – an output is available but not compulsory.
When would you use an Export Column?
The main use for this would be for extracting items stored in the database, or for placing them as files as you move them from point to point in or between data flows.
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