问题
I am curious to know the advantages of using Jaydata with sqlite instead of using sqlite only. As I have found and experienced the difference seems is JSQL(Javascript Query Language) and its already built-in functions. Still,I am not convinced why to opt Jaydata as everyone is using it in their applications with offline db storage providers. Can someone kindly tell me its advantages.
回答1:
disclaimer: I am one of the creators of JayData
JayData is an abstract data management tool that supports the same data access API over a number of different data sources, one of them is sqlite, thus letting you abstract away your data handler logic from the protocol/engine of storage.
On the client side definitely there is IndexedDB and localStore that provides a totally different API an so if you want to create an application that stores data on all HTML5 capable devices - you have to create code for all the different storage options - or you can use JayData and save yourself from a lot of typing.
And there is more to it: if you want to connect to large online data sources you'll need AJAX/REST as protocol layer - just for the very same things to do: create, update, delete or retrieve data. Or you can use the OData and REST adapters for JayData - to save yourself again from a huge amount of code to maintain.
Plus: neither sqlite nor IndexedDB or OData provides you with idiomatic query capabilities since it can only be implemented in the data logic layer - that is javascript bound - and is totally nondoable from an sql string point of view.
So comparing JayData to sqLite is like apples and organges.
来源：https://stackoverflow.com/questions/19978581/advantage-of-using-jaydata-with-local-db-storage-providers