When you do your SELECT, put the phrase "LOCKING ROW FOR ACCESS" in front of it:
LOCKING ROW FOR ACCESS
That will cause the SQL to use access locking which will read uncommitted data and will not cause your program to keep others from updating the data while you're reading it.
If you refer to Teradata documentation- SQL Fundamental then there is Appendix B: Restricted Words. Another document is Release Summary for a given release.