I have a text file of size >5,000,000 KB. It has a header and a trailer record, and all records between these two are body records. The records are pipe-delimited. Each body record has 236 columns. I want to find out the distinct values present in columns 168 and 169. The file is too large to import into Excel, otherwise I could have set a filter on each column and viewed the distinct values. It is also too large to open in MS-Word. How can I go about finding out the distinct values in the two columns I am interested in?