normalization

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Database design (normalization?)

In the following situation, what would the database design look like? This is for some sort开发者_如何学Python of inventory system.[详细]

2023-04-06 07:48 分类：问答
How do I get the ID of multiple inserted rows in MySQL?

I am inserting some words into a two-column table with this command: INSERT IGNORE INTO terms (term) VALUES (\'word1\'), (\'word2\'), (\'word3\');[详细]

2023-04-06 05:34 分类：问答
How to set up a schema for users to authorize access to certain information?

I have a social app that has a user_profil开发者_如何学Ce table with typical standard fields, such as[详细]

2023-04-06 02:16 分类：问答
How to split CSVs from one column to rows in a new table in MSSQL 2008 R2

Imagine the following (very bad) table design in MSSQL2008R2: Table \"Posts\": Id (PK, int) | DatasourceId (PK, int) | QuotedPostIds (nvarchar(255)) | [...][详细]

2023-04-04 17:33 分类：问答
Python: normalizing a text file

I have a text file which contains several spelling variants of many words: For e.g. identification ... ID .. identity...contract.... contr.... contractor...medicine...pills..tables[详细]

2023-04-03 20:13 分类：问答
Should every MySQL table have an auto-incremented primary key?

I understan开发者_StackOverflow社区d the value of primary keys. I understand the value of indexes.[详细]

2023-04-03 03:58 分类：问答
Using OO Inheritance in database vs. Normalization rules

How should you design your database? Using OO inheritance principes or using database normalization ru开发者_运维百科les?Which do you prefer? Why?Thanks.If you are designing a relational database, the[详细]

2023-04-02 21:16 分类：问答
Considerable slowdown due to 40 boolean columns?

I\'m trying to add musical style columns to an event table and from what I\'ve gathered this can be either done by adding a 开发者_运维百科column for each musical style or by doing a many-to-many tabl[详细]

2023-04-01 23:45 分类：问答
Database Normalization and Nested Lists -- Cannot Think of a Solution

I am trying to implement a system on my website similar to that of Facebook\'s \"Like\" feature.Where users can click a button which counter++\'s.However, I have run into a problem in terms of efficie[详细]

2023-03-31 16:48 分类：问答
Vector norm of an array of vectors in MATLAB

When calling norm on a matrix in MATLAB, it returns what\'s known as a \"matrix norm\" (a scalar value), instead of an array of vector norms. Is there any way to obtain the norm of each vector in a m开[详细]

2023-03-31 15:39 分类：问答