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The GROUP Transformation
Flexible Querying for XML |
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There may be duplicate authors in the data, but authors can be grouped to eliminate the duplicates. The transformation given below shows an example that consolidates titles under a single name using a GROUP function for the author's name.
List titles grouped by author name: MORPH (GROUP name) [ title ]To run the tutorial queries, use the demo code.
By default a static grouping is perfomed, in which elements are grouped by their immediate text value. But dynamic grouping is supported by giving a shape as the group pattern.
Dynamically group titles by price: MORPH (GROUP title [ price ]) [ name ]To run the tutorial queries, use the demo code.
Curtis E. Dyreson © 2013. All rights reserved.