Checksum on row

I want to do the following on rows of a table:
- When a row is added calculate some sort of checksum (MD5?) of the
contents of the row.
- Save this value in a dedicated column of the same row.

• Use this checksum to calculate the correctness of the row (including detail rows).

How do I do this using standard methods. This is for a international project, so I need standard tools (like MD5).

Thanks in advance,

Remco Moolenaar

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Remco Moolenaar                                   mailto:remco_at_scc.nl
SCC Internetworking & Databases                     http://www.scc.nl/
Amsterdam, The Netherlands                   mailto:remco_at_bsdapps.org

Maintainer of the BSD Applications database at http://www.bsdapps.org/