A sequence is a data base object that are used to generate unique integers which are used for creating ID values. Each table will have an associated sequence and a data base function to determine the next sequence value. The sequences generate a unique sequential number, but by virtue of the way that the references for next sequence value are made, there is no guarantee (nor a requirement) for consecutive values.

The ID fields are system-managed and are completely internal to the system.

This is unrelated to the application Code Sequences, managed by the IMCS function.

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