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  • Challenge 19 – An Explanation of a Query

    I have received a number of requests for an explanation of my winning query of TSQL Challenge 19 . This involved traversing a hierarchy of employees and rolling a count of orders from subordinates up to superiors. The first concept I shall address is the hierarchyId , which is constructed within the...
    Posted to SQL and the like (Weblog) by Dave Ballantyne on Thu, May 27 2010
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