UNPIVOT: Normalizing data on the fly(weblogs.sqlteam.com)

submitted by jimrice14jimrice14(880) 4 years ago

Everyone seems to want to "pivot" or "cross tab" data, but knowing how to do the opposite is equally important. In fact, I would argue that the skill of "unpivoting" data is more useful and more important and more relevant to a SQL programmer, since pivoting results in denormalized data, while unpivoting can transform non-normalized data into a normalized result set.

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