I have three tables: cat1: cat2: cat3 cat1 has one-to-many cat2, and cat2 has one-to-many cat3. How do I normalize the three tables into on ...
I have three tables: cat1: cat2: cat3 cat1 has one-to-many cat2, and cat2 has one-to-many cat3. How do I normalize the three tables into on ...
My original table which is not normalised looked like this:[1]: https://i.stack.imgur.com/NbKV4.png Now after following the conditions of each form, ...
I'm going over some practice questions. I tried to make a canonical cover - Then finding candidate keys - Is R in BCNF? I thought it isn't in ...
student database that must be normalized 3NF and put into PSQL I am having trouble with what order to insert into the tables in order to keep referent ...
I have a table Subject It has many fields, two of them are code and flag. Earlier those two fields was an idempotention key for rows in this table. Bu ...
I have a time-series location data table containing the following columns (time, first_name, last_name, loc_lat, loc_long) with the first three column ...
I have a database of 5 tables. Some contain the same columns as others, does tying these tables to another table which has the primary keys of other t ...
Storing multiple comma-separated values in a single table field is a notoriously bad design as it impacts performance and breaks relationships. Except ...
I'm using R to connect to a database I have stored in PGAdmin so that I can add data into the database through R. Before adding the data into the data ...
I know that in BCNF if A->B then A must be a candidate key. But what about if A is part of the candidate key but not the whole candidate key? Let ...
I am trying to upload couple panel dataset to MySQL server. But I have couple issues when it came to schema design. How to create a relational schema ...
While writing a library to automatically decompose a given table, I came across some special cases where the first steps of Bernstein's synthesis for ...
Disclaimer that I'm not very versed in relational database design and normalization, but this is something that I've encountered and I'm not sure if t ...
My database tables: 1.jobs table having fields id,name 2.locations table having fields id,name Jobs can have more than one location and locations c ...
I am working on predictive modeling where I need to predict whether an online customer ends up purchasing a product on a website or not, and I am usin ...
When I was practicing normalization I encountered this question: Normalize the following AB (a, b, c, d, e, f, g) b --> c, e c --> e, g a ...
We are using following definition of 3NF: A schema R is in third normal form (3NF) if for all FD α → β in F +, at least one of the following holds ...
When working with data values, should I create a single table storing the hourly values, and also the aggregated daily/monthly values, or should I cre ...
Let's say I have these models: TABLE trainers ( id -- PK -- many fields here... ); TABLE players ( id -- PK, trainer_id -- FK, -- many fie ...
I have a table with 4 columns to display the bill of buying an item, column 1 is the primary key, column 2 and 3 are the price and the amount of the i ...