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The API database integration is divided into three layers: SDBC, SDBCX, and SDB. Each layer extends the functionality of the layer below.

  • Star Database (SDB) is the highest layer. This layer provides an application-centered view of the databases. Services, such as the database context, data sources, advanced connections, persistent query definitions and command definitions, as well as authentication and row sets are in this layer.
  • Star Database Connectivity Extension (SDBCX) is the middle layer which introduces abstractions, such as catalogs, tables, views, groups, users, columns, indexes, and keys, as well as the corresponding containers for these objects.
  • Star Database Connectivity (SDBC) is the lowest layer. This layer contains the basic database functionality used by the higher layers, such as drivers, simple connections, statements and result sets.
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