What is Time-Series Data?

In this post, I want to mention about time series and its databases. Why do we need them? Where can we use? I also add some papers, videos and references to get more detail of them.

Time-series is simple meaning of where time is x axis and data(serie) is y axis in graph. So, we have continuous data and it depends on “Time”. We got until this point. Where can we use these series and need its databases? If your data are stored with time and they are going to be huge(big), you can use them. We can also store them in relational databases as SQL. You are right but just tell a real story. You are twitter and each second a billion tweet is already post and all of them includes at least one hashtag. At the end of day, someone ask how many tweet is post for “this” specific hashtag? (You need something more than traditional databases.) This website ask to twitter API to show stats (warn: you can spend a time! -> keyhole)

Okay, another example, you are ceo of chain market such as Ikea (Välkommen till min blogg – ahah), and you want to see how many customer entered your stores by country for last one month (this is irony, I couldn’t found any best effort database to support month, because you never know how many days in a month. – 30? 31? 28? 29?) Anyway, so you have counter device in all entrances and these devices connect each store and each stores connect to center servers. You need a really good system to handle this throughput. You are a designer, you can use any database or tools to collect these data (even assembly can be solution on network). But you do not have time to discover America again. I love this sentence…

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