Tag Archives: NoSQL

In Relational Data Models, we model relation/table for every object in the domain. In case of Cassandra, this is not exactly the case.This post would elaborate more on what all aspects we need to consider while doing data modelling in Cassandra. Following is the rough overview of Cassandra Data Modeling. As we can see from the diagram above, Conceptual Data ...

Though it’s not mandatory for a Java or Web developers to learn NoSQL database the world is moving in that direction and both Java and Web developer should be familiar with NoSQL databases. If you are wondering what is NoSQL database means then here is a quick overview. A NoSQL database refers to non SQL, non-relational or not only SQL) ...

Previously we used the group by statement extensively in order to execute complex aggregation queries On this tutorial we are going to have a look at ‘into’ statements and the ‘order by’ close. Apart from inserting or selecting data we might as well want to persist the results from one query into another table. The usages on something like this ...

Previously we executed some selection examples and aggregations against an InfluxDB database. In this tutorial we are going to check the group by functionality that the Query Builder provides to us with. Before you start you need to spin up an influxdb instance with the data needed. Supposing that we want to group by a single tag, we shall use ...

Previously we setup an influxdb instance running through docker and we also run our first InfluxDBMapper code against an influxdb database. The next step is to execute some queries against influxdb using the QueryBuilder combined with the InfluxDBMapper. Let’s get started and select everything from the table H2OFeetMeasurement. 01 02 03 04 05 06 07 08 09 10 private static ...

With the release of latest influxdb-java driver version came along the InfluxbMapper. To get started we need to spin up an influxdb instance, and docker is the easiest way to do so. We just follow the steps as described here. Now we have a database with some data and we are ready to execute our queries. We have the measure ...

1. What are NoSql Databases? NoSql (Not only Sql) databases are non-relational databases that are horizontally scalable, persist semi or unstructured data and have flexible schemas. These databases support multiple data models such as key-value, document, column-family, graph based, in-memory etc. for managing and accessing data. NoSql databases are best suited for building modern applications, which require large data and ...

1. Introduction to MongoDB In this post, we feature a comprehensive MongoDB Tutorial that integrates with a Java-based application. Whenever we read about NoSQL databases, we need to know why were they ever developed when SQL databases were working excellent. NoSQL foundations grew upon relaxed ACID (atomicity, consistency, isolation, durability) guarantees in favour of performance, scalability, flexibility and reduced complexity. ...

A natural interface for Java-based data integration with CRM, ERP, Accounting, Marketing Automation, NoSQL, flat files and more Jdbi is a SQL convenience library for Java that provides JDBC with a more natural Java database interface that’s easy to bind to domain data types. The library includes building blocks that allow developers to more easily map relationships and objects within ...