data-modeling

I'm attempting to use Neo4j to model the relationship between projects, staff, and project roles. Each project has a role called "project manager" and a role called "director". What I'm trying to accomplish in the data model is the ability to say "for project A, the director is staff X." For my purposes, it's important that "project", "staff", and "role" are all entities (as opposed to properties). Is this possible in Neo4j? In simpler terms, are associative entities possible in Neo4j? In MySQL, this would be represented with a junction table with a unique id column and three foreign key

I'm trying to design UML Analysis Class Diagram for a college project. My UML Diagram looks like this: I have encountered two different problems: User can have multiple roles. A user with Manager role can manage other users and their roles. How to illustrate this association in UML? User uses SwipeCard to access a room. How to show this association in UML? You have a really good start to an analysis model. Some things I would do: Reify the association between User and Role (or make it an association class) called Role Assignment . Add a verb-phrased property name to every end of every

This question already has an answer here: Why is python ordering my dictionary like so? [duplicate] 3 answers How to keep keys/values in same order as declared? 13 answers I am using this to produce a plot of % of names starting with a certain letter over a span of years. When plotting (and printing) my diction (letter_d) the keys are disordered rather than being sequential like how they are added to the dict. Is there a way to fix this, I believe I am adding them to the dict in a sequential order. If not is there a way I can create connect the dots of my scatter plot in order to simulate the

I have a requirement where I have a table like this, Role Skills Developer C Developer SQL Developer C++ Data Analyst R Data Analyst Python Data Analyst SQL Business Analyst Excel Business Analyst SQL And I need to create something like this in Power BI, Explaining the first result for a Business Analyst in Power BI Visual Table, From Filter 1 - I have selected Data Analyst - whose actual skills are R, Python and SQL From Filter 2 - I have selected a new skill (Upskill) as Excel. So now, he has 4 skills. So For Business Analyst - Row 1 in Visual Table %Skills without upskilling - Only SQL from

I have a database that contains two tables: entries tags The entries table contains posts that each have one or more tags. The problem is, each post can have any number of tags. In other words, I can't have a 'tag1', 'tag2', etc. column and do a LEFT JOIN. How should I set up entries so that each post can have any number of tags? You need a mapping table. Create a table called entries_tags that contains two columns: entry_id and tag_id , with a multi-key on both entries. This is called a many-to-many relationship . You can also do it the SO-way, where in addition to having a junction/mapping

If I am using .Net and SQL Server 2008, what is the best way for me to store a color in the database, should I use ToString or convert it to an integer, or something else? Edit: All I want from the colour is to be able to retrieve it and draw something on the screen in the specified colour. I don't need to be able to query against it. How are the colors stored natively? If you're just using 0xRRGGBB format, you may as well store it as an integer in the database, and re-hexify it when you SELECT (for readability). How to store information in a database depends on how you intend to use and