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SQL or Navigational Database APIs: Which Best Fits Embedded Systems?

For embedded systems developers, the choice of database application programming interfaces (APIs) often boils down to the high-level SQL language and Call Level Interface, and navigational APIs integrated with C++ and other languages. Which API is best? This paper examines the familiarity and ease-of-use often cited as benefits of SQL. A sample application is implemented with SQL and then with a navigational API, to explore the issues of programming ease, maintainability, determinism and learning curve. Special attention is given to the significance of SQL optimizers in evaluating embedded database APIs. 

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