GitHub - developerworks/hierarchy-data-closure-table: This is a mysql and postgresql store procedure and trigger implementation of closure table in RDBMS about hierarchy data model.
![postgresql - What combination of select query and SQL triggers will return each node's ancestry and depth, with triggers maintaining the closure table? - Stack Overflow postgresql - What combination of select query and SQL triggers will return each node's ancestry and depth, with triggers maintaining the closure table? - Stack Overflow](https://i.stack.imgur.com/PJZRz.png)
postgresql - What combination of select query and SQL triggers will return each node's ancestry and depth, with triggers maintaining the closure table? - Stack Overflow
![mysql - How to get child nodes without grandchildren and great-grandchildren? Closure Table pattern - Stack Overflow mysql - How to get child nodes without grandchildren and great-grandchildren? Closure Table pattern - Stack Overflow](https://i.stack.imgur.com/DqyGF.png)
mysql - How to get child nodes without grandchildren and great-grandchildren? Closure Table pattern - Stack Overflow
![mysql - ORDER BY on aggregate field on a closure table giving unexpected results - Database Administrators Stack Exchange mysql - ORDER BY on aggregate field on a closure table giving unexpected results - Database Administrators Stack Exchange](https://i.stack.imgur.com/g7d9z.png)