0
votes
0answers
39 views

Database model for keeping track of likes/shares/comments on blog posts over time

My goal is to keep track of the popular posts on different blog sites based on social network activity at any given time. The goal is not to simply get the most popular now, but instead find posts ...
0
votes
0answers
7 views

How to manage primary key while updating [closed]

In the following table primaryKeyColumn is primary key. To maintain the data history I always uses the values with WHERE condition(WHERE StatusColumn=1) And will set the StatusColumn to 0 if the data ...
15
votes
4answers
1k views

Why many designs ignore normalization in RDBMS?

I got to see many designs that normalization wasn't the first consideration in decision making phase. In many cases those designs included more than 30 columns, and the main approach was "to put ...
2
votes
2answers
218 views

Using Autoincrement Primary keys as Foreign Keys

When creating a table, there is an option for us to set the numeric primary key as autoincrement where it's value increases whenever a new data in inserted. This primary number can be used for ...
0
votes
4answers
199 views

Create a database for database tables

I'm working on a project where I have to give users the ability to build their own tables, each user can create more than one table. (the type of all data is string). The user can create a table and ...
1
vote
1answer
445 views

How can I implement a database TableView like thing in C++?

How can I implement a TableView like thing in C++? I want to emulating a tiny relation database like thing in C++. I have data tables, and I want to transform it somehow, so I need a TableView like ...
1
vote
5answers
2k views

Externalising SQL Queries in Java

What are the advantages and disadvantages of externalising SQL queries in Java (or similar general-purpose object-oriented programming language. Externalizing means storing all SQL in a separate ...
1
vote
2answers
388 views

SQL language drawbacks, The Third Manifesto

Sometime ago I read about SQL language drawbacks (the basic language specification, not vendor specific), and one of the drawbacks was that the language does not allow to create a set of tuples that ...
3
votes
1answer
362 views

How would one build a relational database on a key-value store, a-la Berkeley DB's SQL interface?

I've been checking out Berkeley DB and was impressed to find that it supported a SQL interface that is "nearly identical" to SQLite. ...
2
votes
1answer
440 views

Sanity of design for my in-memory object representations of database rows

I've been trying to revise the structural design of the C#.NET-based system I'm currently working on. The new design involves a rather light-weight object-relational mapping framework (we're trying ...
7
votes
5answers
542 views

Why is SQL known as a relation-based / functional language?

We're learning that most languages are classified as either of the two, "relation based" or "high level". I've never used SQL before, but from reading its syntax it seems more like the ...
6
votes
2answers
327 views

What are some useful resources for learning tuple calculus?

I've been trying to go over my tuple calculus over and over again. What's worse is that my professor and tutors are not much help during their hours. Does anyone know a good place to learn about ...
3
votes
1answer
187 views

Equality between arity and degree concepts in relational theory

I've been reading the book "SQL and Relational Theory: How to Write Accurate SQL Code" by C. J. Date. I have no formal background in CS, much less relational theory. Combined with the fact English is ...