The interviewer didn't like the answer because it didn't answer the implicit question, which is how well you can write your own software. We know that you can load a table into SQLite and have it do the heavy lifting for you. But we're often not looking for software _users_ as much as we're looking for _engineers_.
When we interview people, the answers we want often aren't real-world answers because we're trying to get a deeper understanding of how you think or how well you know the details of a complex mechanism.
When we interview people, the answers we want often aren't real-world answers because we're trying to get a deeper understanding of how you think or how well you know the details of a complex mechanism.