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I am making real-estate database and it seems i am doing something wrong, because i have several loops on my design. is it OK or i need to redesign all DB schema?
Here is my Current Schema:
There is nothing wrong with “loops” in a database design. Sometimes you do need to traverse data in multiple directions.
Whether this is model right for your application and the application needs is a much more difficult question and one that can’t be answered without full details of the application and its data needs.