database-normalization

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have address columns in each table or an address table that is referenced by the other tables?

Say I had three tables: Accommodati开发者_运维技巧on, Train Stations and Airports. Would I have address columns in each table or an address table that is referenced by the other tables? Is there such[详细]

2023-01-08 10:32 分类：问答
Separate tables for just one field can be logical?

If I have one table which has a City fie开发者_如何学编程ld and as expected this field will repeat itself so only separate it to another table can be ok for normalizing concepts? I mean separated tabl[详细]

2023-01-02 19:10 分类：问答
should this database table be normalized?

i have taken over a database that stores fitness information and we were having a debate about a certain table and whether it should stay as one table or get broken up into three tables.[详细]

2022-12-26 16:56 分类：问答
How to Set Customer Table with Multiple Phone Numbers? - Relational Database Design

CREATE TABLE Phone ( phoneID - PK . . . ); CREATE TABLE PhoneDetail ( phoneDetailID - PK phoneID - FK points to Phone[详细]

2022-12-26 16:05 分类：问答
How to answer this interview question? [closed]

As it currently stands, this question is not a good fit for our Q&A 开发者_高级运维format. We expect answers to be supported by facts, references,or expertise, but this question will likely so[详细]

2022-12-25 06:47 分类：问答
How do you normalize one-to-one-or-the-other relationships?

I\'m storing data on baseball statistics and would like to do so with 开发者_如何学运维three tables: players, battingStats, and pitchingStats. For the purpose of the question, each player will have ba[详细]

2022-12-24 09:05 分类：问答
What kind of normalization rule does this violate?

Suppose I have two tables on a database, T10开发者_JAVA百科 and T11, having 10 and 11 columns, respectively, where 10 of the columns are exactly the same on both.[详细]

2022-12-22 10:07 分类：问答
Database normalization - how deep should I link tables together?

I have three tables: Post, Attachment, and Media. Posts have Attachments, an开发者_运维知识库d Attachments have Media.[详细]

2022-12-22 01:54 分类：问答
Normalization in plain English

I understand the concept of database normalization, but always have a hard time explaining it in plain English - especially for a job interview.I have read the wikipedia post, but still find it hard t[详细]

2022-12-21 09:00 分类：问答
Is database normalization still necessary?

Is database normalization still \"the thing?\" When I studied during a databases course 开发者_如何学运维we were taught all levels of normalization and were said that we must always do it.[详细]

2022-12-19 05:08 分类：问答