[Jprogramming] sorting a table by nth column

[Alex Giannakopoulos]

Even though I've been using J lightly for a quite while, I have not so 
far had cause to use boxing, especially boxed tables.
Great feature, if you need it, but I'm struggling a bit to get up to speed.
Say I have a two column table such as would be generated by

    ([;somefunction)"0 i.100

How would I sort the table by the second column?
Any other help or pointers to relevant docs appreciated!