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In this tutorial, we learned how to work with the lag() function to get the previous item from the current row.About the author John Otieno My name is John and am a fellow geek like you. I am passionate about all things computers from Hardware, Operating systems to Programming. My dream...
With a NoSQL database there is no strict schema. Everything is effectively collapsed into one very fat table – a bit like an old school flat file, but where each row stores a huge amount of data. So, instead of having a table for Users and a table for Activities (representing User’...
In this lesson, we will use Redis in a real-world application. For this reason, we are going to build a simple Java application which uses Redis and the excellent Spring Data Redis project together with the Spring Framework. We will choose a Redis Java client, introduce the relevant dependen...
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In this tutorial, we walked you through the various methods and techniques of adding days to a given date in SQL databases. It is good to choose the right method for your database of choice as shown in this post. About the author John Otieno My name is John and am a fellow geek like...
In this tutorial, we learned how we can perform the mathematical division in SQL by dividing two table columns to fetch the results for each corresponding value. About the author John Otieno My name is John and am a fellow geek like you. I am passionate about all things computers from Hard...
MongoDB and Java Tutorial In this part we are going to cover the integration of MongoDB with applications written in Java. Our choice of Java is caused by its popularity but MongoDB provides bindings (or drivers) to many other languages. For the purposes of this lesson, we are going to ...
Following on from Part 2 of this series where I created and deployed the Product Entity Service using the SOA ‘contract-first’ technique, I’m now going to