Hierarchical database structures and Firebird PSQL
Posted by mariuz on 10 Dec 2011 3:26 am. Filed under General news.
The idea of storing a hierarchical data in a relational database is very simple, but effective work with such a data requires some knowledge of server-side programming using procedural SQL (PSQL). So the hierarchical data structures are a good chance to get acquainted with PSQL. For demonstration purposes I created a simple database with single table TCLASS containing Delphi class hierarchy
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