What开发者_StackOverflow is the real difference between one-to-many and many-to-one relationship? It is only reversed, kind of?
I have a query and I\'m not sure how to limit the users by last login date.i only want to return the users who have logged 开发者_StackOverflow中文版in in the last week. Here\'s my query:
I\'m looking for some guidance as to how to set up a database I am creating.I think the best way to ask the question is to describe the specific scenario:
I have a question my db model looks like: class UserAnswer (db.Model): user = db.UserProperty() name = db.StringProperty()
My question is related to ServiceASpecificField and ServiceBSpecificField. I feel that these two fields are placed inappropriately because for all records of service A for all subscribers in Subscri
how to join 3 relational tables with the structure: t1 | id t2 | id | rating t3 | source_id | relation 开发者_运维百科
I am working with the Yahoo! Developer API and there are a lot of responses that I would like to persist to relational tables (SQL Server) so that I can query it later (and over time). Is there a tool
I hope someone will give me an idea how to proceed, because I\'m losing my mind right now. I just made two tables in my database. First one looks like this:
I think it\'s best to ask based on an example: There are people, customers and projects. People to customers is a n:m relationship. People can work for multiple customers.
I posted this question earlier but i didn\'t get any answer ! i will try to rephrase it and make it more clear hoping to get helpful advice.
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