Can Oracle SQL generate a hierarchical output structure?

Data and Databases
1

I need to confirm whether Oracle SQL can generate hierarchical structures. For example, consider the data below:

NODE|LINK|DEPTH|PARENT_ID
A   |B   |null  |null
A   |B   |1     |null
A   |B   |1     |3
A   |B   |1     |3|1
A   |B   |2     |null

Is this feasible?

2

hey, i believ oracle sql can do this using the connect by clause. have ya seen any issues with null values? im curiouos to know how others handle it in more complex datasets…

3

yep, works fine. i tink you can use connect by, but keep an eye out on null values as they sometimes trip up your query. might need a bit of tweaking if the hierarchies get messy.

4

Oracle SQL is well equipped to generate hierarchical output structures, and my experience confirms that it is feasible with the use of the CONNECT BY clause. In my projects, properly handling null values required careful adjustments, often utilizing functions like NVL to ensure that parent-child relationships were correctly interpreted. I have also found that establishing clear criteria for node linkage is essential, especially when hierarchies are deep or involve variable data entries. Overall, with diligent query design, Oracle SQL proves to be a reliable tool for managing hierarchical data.