Last week we went through the second stage of the rather painful process of setting up a simple Django example. For most people, this is not really a simple process, and if you have managed to survive through it, you have done well. A project from scratch The quick summary of beginning to set up [...]
The Django script manage.py can be used to create our new table. We pointed out in the previous newsletter that the table created will differ between databases, and this newsletter will consider some of this variation and what we can learn from it. […]
In the preceding issues of this newsletter, we have considered the basics of data modelling, data types, connections, identifiers and many other things. One point we have kept returning to is a fundamental rule of data modelling: Don’t make anything any more complex than you have to. Or to put it another way: Don’t store [...]
Last week in our modelling case study we walked a little farther down the path of providing a database in which we could store the information from an EPANET input file. This week, we finish our look at this example, but before we tie off the threads, let’s remember that the EPANET analysis is a [...]
EPANET Network Components – Database tables and rows, Part 3 (#20) In this case study we are going through the process of designing a database for storing the information contained in an input file for EPANET, software which can analyse water supply distribution networks. Well, it has been hard work going through our simple EPANET [...]
EPANET Network Components – Database tables and rows, Part 2 (#19) In this case study we are going through the process of designing a database for storing the information contained in an input file for EPANET, software which can analyse water supply distribution networks. The last post in our continuing case study modelled the spring [...]
In this case study we are going through the process of designing a database for storing the information contained in an input file for EPANET, software which can analyse water supply distribution networks. The last post waded through the definition of the physical data of our spring-tunnel-pool model. We put all the information into an [...]
EPANET example – physical data In this case study we are going through the process of designing a database for storing the information contained in an input file for EPANET, software which can analyse water supply distribution networks. Earlier posts in this series are #13, #14, #15 and #16 and this article deals with our [...]
In this case study we are going through the process of designing a database for storing the information contained in an input file for EPANET, software which can analyse water supply distribution networks. […]
Hezekiah’s tunnel is a simple network that we can use to see how our modelling proceeds. The previous sentence described the network we are toying with, and this will be typical for most situations. EPANET allows networks to have a title, so let’s look at how this would be modelled. […]