How to update column in table A when row selected on table B view

[Mahesh]

When a row is selected from a view of table B, I want a column value from B to be used to update a column on table A. I think I need an action on table B and another one on table A but not sure how to make both of them work together so column value of B would update into A.

Once I solve the above issue, I will another similar issue to solve. I need to create a new row in table X using columns values of the row selected on view of table Y. Again, I am guessing more than one action needed but not sure how to string them up.

Thanks!