Database schema and query to accumualte total amount of days for each "category" of an ani...

Are these two database queries logically equivalent?...

Database for an online store...

Is it really better to respect the normal forms and create an additional table for one simple field?...

update maintenance date in customer table from the latest date in service table...

using Dapper the way EF Core does it wrongly returns what SQL does...

Unpacking nested JSON data from relational database in pandas...

query based on previous lines values: values that open the 30 days windows (and are not inside them)...

relational database design (normalizing many-to-many mappings)...

Attempt to read property "name" on null and $book->category?->name result in one rec...

Understanding Database Normalization - Second Normal Form(2NF)...

Intuition behind 2NF in normalization of relational databases...

One to many relationship in Product Ordering System with Crow's Foot Notation...

Classifieds website Database design...

Functional dependencies after normalization...

SQL Server database missing INFORMATION_SCHEMA and sys users...

Storing user contacts on server database (parse.com)...

In SQL, can you add a foreign key constraint on a set of attributes, so that all of them must be on ...

One to Many relationships db modeling : why most people choose a foreign key over a composite key?...

How do I write a SQL query to display course_id, course_name and fee collected from each course?...

EF Core One-to-Many Linq query...

Why is this attribute redundant ? What is the closure for these attribute sets?...

Table 'shopping_cart', which contains 2 foreign key as primary key and other foreign key, ha...

How do I "link" two tables when the primary key of table_a could exist in none, one or man...

GUID as PK or as index only?...

How do I correctly update User state in React with a has_many :trails, through: :reviews association...

Define an order for a sqlite table?...

JPA cannot change column used in foreign key constraint...

Creating a 3 column Data Frame in Pandas...

Can a database attribute be primary and foreign key?...