Bachman/Schema Diagram

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The triangles indicates records that are indexed. “CALC” records are stored and retrieved based on a Hash-Key. “VIA” records are stored physically on the same page as the CALC records (unless they overflow to the following database pages).



NOTE: There is a utility called “Schema Plus” that will draw (plot) Bachman (schema) diagrams for you (directly from your data dictionary). To learn more, visit this page: Schema Plus. It was formerly maintained by Bill Allen of ARCH Consulting.