Question

Say I have the following structure in a table:

+-------------+----------------+-----------+
| category_id | name           | parent_id |
+-------------+----------------+-----------+
|           1 | foo            |         0 |
|           2 | bar            |         0 |
|           3 | baz            |         1 |
|           4 | test           |         2 |
|           5 | test1          |         3 |
|           6 | test2          |         5 |
+-------------+----------------+-----------+

Does anyone have any pointers to achieve the following output:

foo
bar
foo > baz
bar > test
baz > test1
baz > test 1 > test2

I’m open to changing my schema if it helps, not sure if it is the best method to store the data?

Thanks

Answer 1

maybe you want to have a look at nested sets