I was recently make aware of an undocumented feature that's been in InterBase for more than 2 decades. It's the fact that every row in every table has a unique identifier. I think it is best thought of as a Raw Record position. This field is called RDB$DB_KEY. RDB$DB_KEY is an array of 16 bytes. Array's are handled differently with different drivers so you have to cautious about how you use this data type. However, RDB$DB_KEY provides the fastest access to uniquely identify a row in a table, so ...
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