Deleting hierarchical data in SQL table

Question

I have a table with hierarchical data.
A column \"ParentId\" that holds the Id (\"ID\" - key column) of it\'s parent.

When deleting a row, I want to delete all c

Answer 1

Add a trigger to the table like this

create trigger TD_MyTable on myTable for delete as -- Delete one level of children delete M from deleted D inner join myTable M on D.ID = M.ID

Each delete will call a delete on the same table, repeatedly calling the trigger. Check books online for additional rules. There may be a restriction to the number of times a trigger can nest.

ST