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write SQL query that takes its own output as input

In a table that displays how trades are related to each other, starting from one trade, I want to find all other trades that relate to the first trade: 713613 PostPTETradeIDs 718478 713613 ...
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2answers
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Joining two ltree based tree tables recursively

I have two tables, roles and permissions, both of which use ltree for maintaining a tree structure. I also have a pivot table, roles_permissions, which serves to connect the two tables. How can I join ...
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How to get the hierarchy of particular employee using JPA spring boot?

I am trying to find a way to get the employee hierarchy in an organization using JPA and Spring boot. The problem is similar to the following link Similar Data Model If A reports to B and B reports ...
3
votes
1answer
1k views

Help on Self-Referential CTE SQL SERVER

I have this table below which is has a hierarchy to it where the number of levels vary, for this example I chose a subset with 7 levels. L_Key Parent Level P_Key ------------------------- 1393 ...
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2answers
585 views

self-joins in recursive CTE: `recursive reference must not appear more than once`?

This is tested with PostgreSQL 9.6, but it's a general SQL question. Is it possible to use self-joins of the recursive table in a recursive CTE (rCTE)? I tried the following rCTE containing a self-...