Hi Sanjay, I think you might be best off with the manual way -- select from MySQL and write out to CSV. MySQL Query Browser has a "Export as CSV" function. I think you would probably have to open the csv file to be sure the format matches something FSB can read. Then save to FSB's data folder, hit Ctrl L, FSB loads the new data file.
Another way is to write a small app to enter the query parameters, retrieve the data from MySQL, and write out the data in a csv with the correct format. This is what I do for my 5-minute data, I didn't like opening MySQL Query Browser all the time.
If you really want to connect FSB to MySQL, there is the MySql.Data.MySqlClient class. I use this class for interfacing with MySQL, but only for inserting some data I calculate in FSB. If you select the data this way, then it would be another step to get that returned data into the Data object that FSB uses. I suppose it could be done, but then it is a question of, is it worth doing the extra step? or using the csv technique above? I've opted for the csv technique, just personal preference that it got the job done quickly, works with the existing program design, and is not too inconvenient.