sql - Oracle SELECT query to find the smallest distinct delimited string -

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i have below table

c1      |  path --------|----------- t1      | t0/t1 t2      | t0/t1/t2 t3      | t0/t1/t2/t3 x1      | t0/x0/x1 t2      | t0/x0/x1/t2 t3      | t0/x0/x1/t2/t3 t3      | t0/y0/y1/y2/t3 y3      | t0/x0/x2/y3 y4      | t0/x0/x2/y3/y4

i need write q query or code should return smallest distinct delimited string shown below

c1      |  path --------|----------- t1      | t0/t1 x1      | t0/x0/x1 t3      | t0/y0/y1/y2/t3 y3      | t0/x0/x2/y3

ex: t0/t1 substring of t0/t1/t2 , t0/t1/t2/t3.
t0/y0/y1/y2/t3 not substring of other string. distinct.

can please me write query in oracle

try:

select t1.* table1 t1 left join table1 t2 on t1.path <> t2.path    , t1.path '%'||t2.path||'%'  t2.c1 null

demo: http://sqlfiddle.com/#!4/a3f87/3

| c1 |           path | |----|----------------| | t1 |          t0/t1 | | x1 |       t0/x0/x1 | | t3 | t0/y0/y1/y2/t3 | | y3 |    t0/x0/x2/y3 |

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