I use SSIS to import some text files to sql db tables. SSIS packge runs without any problem. But for some reason I need to be 100% sure the data from text files are imported to the sql tables without any change. How can I prove it? or how test it? Thanks in advance.
do you've set of columns identified as primary key (or business key)? in that case you could check for case of any missing records in the table based on values in text file to make sure they all got transferred fine.
Strange but simple, your client will come back to you if there's any mismatch or something wrong with loaded data. Second way, create simple import/export job and run the mapping from SSMS; it will give you the number of rows read from Source and the number of records that were sent to target. You would see the number of records that were errored out, if any.