What's a good natural key? This is a very difficult question for most entities when you design your schema. In some rare cases, there seems to be an "obvious" candidate, such as a variety of ISO standards, including: ISO 639 language codesISO 3166 country codesISO 4217 currency codes But even in those cases, there might … Continue reading The Cost of Useless Surrogate Keys in Relationship Tables →
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