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Binary Trees in SQL

A number of hierarchies and networks are most conveniently modelled as binary trees. So what is the best way of representing them in SQL? Joe Celko discards the Nested Set solution in favour of surprisingly efficient solution based on the Binary Heap

2010-07-20

4,764 reads

Technical Article

Extending Hierarchical Data Modeling Demonstrated in SQL

The capability of extending the limits of combining multiple node hierarchical structures has not been fully explored. Michael M. David presents a solution to advanced structure combining that is simple to use, generic and freely extends the way hierarchical structures can be semantically combined to produce advanced new hierarchical data structure mashups that dynamically increase the value of the data.

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2010-07-16

3,196 reads

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Question of the Day

BIT_COUNT() IV

In SQL Server 2025, I run this code:

select bit_count('A')
What is returned?

See possible answers