Non Relational Database , Key Value or flat table

大城市里の小女人 提交于 2020-01-24 19:35:49

问题


My application needs configurable columns , and titles of these columns get configured in the begining, If relation database I would have created generic columns in table like CodeA, CodeB etc for this need because it helps queering on these columns (Code A = 11 ) it also helps in displaying the values (if that columns stores code and value) but now I am using Non Relational database Datastore (and I am new to it), should I follow the same old approach or I should use collection (Key Value pair) type of structure .

There will be lot of filters on these columns. Please suggest


回答1:


What you've just described is one of the classic scenarios for a Key-Value database. The limitation here is that you will not have many of the set-based tools you're used to.

Most of the K-V databases are really good at loading one "record" or small set thereof. However, they don't tend to be any good at loading anything that may require a join. Given that you're using AppEngine, you probably appreciate this limitation. But it's worth stating.

As an important note, not all K-V database will allow you to "select by any column". Many K-V stores actually only allow for selection by a primary key. If you take a look at MongoDB, you'll find that you can query any column which sounds like a necessary feature.




回答2:


I would suggest using key/value pairs where keys will act as your column names and value will be their data.



来源:https://stackoverflow.com/questions/3794283/non-relational-database-key-value-or-flat-table

易学教程内所有资源均来自网络或用户发布的内容,如有违反法律规定的内容欢迎反馈
该文章没有解决你所遇到的问题?点击提问,说说你的问题,让更多的人一起探讨吧!