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logic/db question

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hi...

i have a tbl
 fooTBL
   name
   parentID
   ID

so a name can have might have a parentID, as well as an ID. 'name's are
associated with other 'name's via the parentID. in other words, if a name's
parentID == a name's ID, name1 is the parent of name2.

  name	parentID 	ID
  foo		 -		1
  cat		1		2
  dog  	2		3

my question, how can i come up with a sql query that will list all the
children (and children's children...) of a top level item?

i had done this awhile ago.. but can't recall how i did it..

thanks




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