relational

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What choices for a relational Document-store (NoSql?) database engine?

What choices are there for document-store databases that allow for relational data to be retrieved? To give a real example, say you have a database to store blog posts. I\'d like to have the data look[详细]

2023-02-23 07:30 分类：问答
How to design a media table with references to multiple (at least 4) tables?

I am designing a database for my cookbooks. I have created multiple tables in my design: books, authors, recipes, ingredients and for all these items I want to link media (images or video) to items in[详细]

2023-02-14 09:17 分类：问答
NoSQL good solution for daily data?

I\'m developing a restaurant application and there will be daily orders for particular guests. because of that daily base of data I thought to use a NoSQL Database e.g. MongoDB to avoid a lot of joins[详细]

2023-02-12 02:04 分类：问答
Relational Algebra

Can you please help me solve this in Relational Algebra?I\'ve got this DB (Thesis Defense); Teachers(Teacher_ID, Name, Specialty)[详细]

2023-02-07 03:51 分类：问答
Relational tables: a 3rd table with relations

I\'m building a php page that will show an specific banner when the user enters his/her phone number in a form field.[详细]

2023-01-31 02:19 分类：问答
(De)Normalization of two relations

People who read C.J.Date\'s Introduction to Database System or books of similar level should not have problems with definition of normalization and denormalization.[详细]

2023-01-27 08:25 分类：问答
Database schema-related problem

I have a kind of theoretical question about databases. To make it more concrete I have thought up an example case.[详细]

2023-01-26 20:54 分类：问答
Relational modelling question

We have three entities called Product, ProductType, and ProductCategory. Let\'s pretend we have three kinds of ProductType: Book, Music, and Video.[详细]

2023-01-22 21:37 分类：问答
Question on Database Design Tips

This is not a homework, but new task assign by superior. To create a system for in-house end-users, which auto suggest to different assembly line based on each line\'s capacity. Users need to maintain[详细]

2023-01-19 09:39 分类：问答
How to represent "not exists" in relational algebra?

How do I rep开发者_Go百科resent the SQL \"not exists\" clause in relational algebra?The SQL NOT EXISTS construct can be represented in relational algebra by the antijoin ▹.[详细]

2023-01-16 09:59 分类：问答