cardinality_开发者

Patterns and Practices for Enforcing Object Association Cardinality

I\'ve been thinking about object-oriented principals / practices / paradigms such as SOLID, Law of Demeter, and DDD a lot lately and a theme that continues to surface is enforcing object cardinality.[详细]

2023-04-08 05:19 分类：问答

Update statement taking too long to execute

I am running a Simple Update statement开发者_如何学Go. Its taking too long to execute. Here are the Updateand index details.[详细]

2023-04-02 05:52 分类：问答

Is NULL cardinality in an index a problem - MySQL 5.x

I\'m having performance problems on开发者_如何转开发 the live version of a system which I can\'t reproduce locally.[详细]

2023-03-16 17:45 分类：问答

What is cardinality and how does it affect performance (SQL Server)?

We have a massive table where I need to make an update on a single row. I don\'t know the primary key of the row, but I have a varchar value that is unique within that table. I also have the value of[详细]

2023-03-16 06:39 分类：问答

Data Cardinality

I\'m confusing about 0:M relationship. So, I want to ask about that. Assumes we have 2 tables : Contact which has attributes like : ContactID(PK),[详细]

2023-03-14 03:04 分类：问答

is there an ordinal to cardinal function in ruby or rails?

I\'m trying to find a better way in expressing my cucumbers so I am looking for an ordinal to cardinal function that converts this:[详细]

2023-03-03 01:01 分类：问答

Interpreting a primary key from table data

I have a legacy database imported into sql server 2008 r2 that contains no indexes and no primary/foreign keys for hundreds of tables (some with hundreds of columns). The primary keys which I\'ve iden[详细]

2023-02-23 18:36 分类：问答

What is the difference between Max Cardinality and Min Cardinality?

I am having a hard开发者_如何学Go time understanding what is the difference between the Max and Min cardinalities when trying to design adatabase.Remember cardinality is always a relationship to anoth[详细]

2023-02-12 23:16 分类：问答

MS Visio 2007: How do I get the cardinality to appear on both ends of a relationship?

In Visio 2007, I can only seem to set the cardinality of the Parent-to-child relationship, but I want to set the Child-to-Parent as well. Is there a开发者_如何学JAVA reason Visio won\'t let me do this[详细]

2023-02-11 14:30 分类：问答

How to interpret term cardinality?

An SRS document is provided describing various aspects of the end-product, system maintenance tool. The only paragraph I\'m failing to understand is \"Component Cardinality\". What does this term mean[详细]

2023-02-02 07:16 分类：问答