relational-database Examples and Free Source Code

What's the best way to store an array in a relational database?...

sqlite database-design relational-database database-normalization first-normal-form

How to persist a graph data structure in a relational database?...

database graph relational-database

Entity Core Framework - what is the difference between HasColumnType and HasPrecision?...

c#.net entity-framework-core orm relational-database

SQL Database Table relation based on multiple conditions...

sql database-design relational-database table-relationships

what are the advantages of defining a foreign key...

sql-server database-design foreign-keys relational-database

Database Tables For Multiple Roles...

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Constrain Data Based on Implicit Relationships in Entity Framework Core...

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How to write query for a condition on join table...

ruby-on-rails database postgresql orm relational-database

find student numbers of students who take all courses in department 'CS'...

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Why do these sample relations have many valid joins but only one composition?...

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Clear explanation of the "theta join" in relational algebra?...

sql relational-database cartesian-product relational-algebra

How can I load multiple levels when lazy loading in EF Core?...

c#sql-server entity-framework-core relational-database lazy-loading

How to open postgresql heap file...

postgresql relational-database internals

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

postgresql database-design relational-database database-schema supabase

Are these two database queries logically equivalent?...

sql relational-database

Database for an online store...

mysql ruby-on-rails database relational-database database-schema

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

database-design relational-database database-normalization

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

sql mysql database sql-update relational-database

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

c#sql asp.net-core relational-database dapper

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

python pandas relational-database

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

sql postgresql date relational-database

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

sql relational-database database-normalization

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

php laravel laravel-blade relational-database one-to-many

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

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

relational-database database-normalization

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

database relational-database data-modeling erd

Classifieds website Database design...

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Functional dependencies after normalization...

database-design relational-database database-normalization functional-dependencies 3nf

SQL Server database missing INFORMATION_SCHEMA and sys users...

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

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