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Articles with tag Database Design Rss

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<< Newer    Items 21 to 40 of 290    Older >>
 

Designing Databases for Rapid Resilience

As the volume of data increases, DBAs need to plan more actively for rapid restores in the event of failure. For this, the intelligent use of filegroups is important, particularly when the Enterprise Edition of SQL Server offers the hope of online restores. How, though, should you arrange your data on the different filegroups? What happenens if the primary filegroup gets corrupted? Why backup and restore indexes?  Read more...
By Additional Articles 2012/11/13 | Source: SimpleTalk | Category: resilience
Rating:  Rate this |   Briefcase | 2,545 reads

Stairway to Database Design Level 1: Data Elements

Before you start to think about your database schema or tables, you need to consider your data: the type of data it is, the scale you use for values. It needs to be unique, precise and unambiguous. Then you need to name it in such a way that it can be generally understood. Joe Celko explains...  Read more...
By Joe Celko 2013/07/03 (first published: 2010/04/27) | Source: SQLServerCentral.com | Category: stairway series
Rating: |  Discuss |   Briefcase | 35,076 reads

Physical Database Design Consideration

There are lots of things to think about when you design a physical database. What data types should I use? What column is appropriate for the primary key? Are there particular indexes that I should use to improve performance? How should I implement data integrity rules? This list goes on and on. In this article Greg Larsen will be exploring different physical database design elements.  Read more...
By Additional Articles 2012/01/24 | Source: Database Journal | Category: database design
Rating: (not yet rated)  Rate this |   Briefcase | 3,451 reads

Constraints and the Test-Driven Database

Bad data always seems to appear when, and where, one least expects it. Sam explains the great value of a defensive approach based on constraints to any team that is developing an application in which the data has to be exactly right, and where bad data could cause consequential severe financial damage. It is perhaps better seen as creating a test-driven database.  Read more...
By Additional Articles 2012/01/09 | Source: SimpleTalk | Category: database design
Rating: (not yet rated)  Rate this |   Briefcase | 2,179 reads

Stairway to Database Design Level 9: Normalization

In the final step of Database Design, Joe Celko gives a simple but effective explanation of the normalization process and why it is important.  Read more...
By Joe Celko 2011/11/11 | Source: SQLServerCentral.com | Category: stairway series
Rating: |  Discuss |   Briefcase | 11,182 reads

Stairway to T-SQL DML Level 3: Implementing a Relational Model in SQL Server

This level of the stairway details the creation of a relational database, as well as filling in some of the history of the relational database model.  Read more...
By Gregory Larsen 2011/11/09 | Source: SQLServerCentral.com | Category: stairway series
Rating: |  Discuss |   Briefcase | 12,064 reads

Stairway to Database Design Level 8: Cursors

This final level to the first landing completes the basics of a SQL database, by explaining what cursors are and why you should never use them.   Read more...
By Joe Celko 2011/11/02 | Source: SQLServerCentral.com | Category: stairway series
Rating: |  Discuss |   Briefcase | 8,567 reads

PASS Data Architecture Virtual Chapter presents Characteristics of a Great Relational Database

On Thursday October 20th ,MVP Louis Davidson will discuss the why normalized databases are the most important part of query tuning  Read more...
By Press Release 2011/10/20 | Source: SQLServerCentral.com | Category: webinar
Rating: (not yet rated)  Rate this |   Briefcase | 1,402 reads

Stairway to Database Design Level 7: Triggers

In levels one to four, we built the tables, base and virtual, of a schema. Levels five and six dealt with stored procedures. This level deals with a feature you need to avoid as much as possible; this is article is on Triggers.  Read more...
By Joe Celko 2011/09/30 | Category: stairway series
Rating: |  Discuss |   Briefcase | 9,634 reads

Stairway to Database Design Level 6: Procedure Bodies

Having covered the procedure headers in SQL Server in the previous level, Joe tackles the subject of the contents of stored procedures. In this level, he outlines limitations of TSQL as a procedural language, and what you need to bear in mind when deciding how to use them.  Read more...
By Joe Celko 2011/09/21 | Source: SQLServerCentral.com | Category: stairway series
Rating: |  Discuss |   Briefcase | 10,095 reads

An alternative to GUIDs

GUIDs are often regarded as a necessary evil but how necessary are they?  Read more...
By David Poole 2011/09/15 | Source: SQLServerCentral.com | Category: guids
Rating: |  Discuss |   Briefcase | 10,359 reads

Third Normal Form

The third article in our series on normalization from Tom Thomson continues with an explanation on what constitutes third normal form.  Read more...
By Tom Thomson 2011/07/28 | Source: SQLServerCentral.com | Category: normalization
Rating: |  Discuss |   Briefcase | 7,371 reads

Yet Another SQL Strategy for Versioned Data

There is a popular design for a database that requires a built-in audit-trail of amendments and additions, where data is never deleted, but superseded by a later version. Whilst this is conceptually simple, it has always made reporting the latest version of data complicated. Alex Kuznetsov joins the debate on the best way of doing this with an example using an indexed view and the filtered index.  Read more...
By Additional Articles 2011/07/15 | Source: SimpleTalk | Category: database design
Rating:  Rate this |   Briefcase | 3,127 reads

Second Normal Form

In this article Tom Thomson takes a look at what second normal form means, how it is violated, and how you can fix it. This is part of our normalization series.  Read more...
By Tom Thomson 2011/07/14 | Source: SQLServerCentral.com | Category: normalization
Rating: |  Discuss |   Briefcase | 7,685 reads

First Normal Form

Learn the basics of first normal form and what that means to a database designer from Tom Thomson.  Read more...
By Tom Thomson 2011/06/30 | Source: SQLServerCentral.com | Category: normalization
Rating: |  Discuss |   Briefcase | 10,402 reads

A Tale of Identifiers

Identifiers aren't locators, and they aren't pointers or links either. They are a logical concept in a relational database, and, unlike the more traditional methods of accessing data, don't derive from the way that data gets stored. Identifiers uniquely identify members of the set, and it should be possible to validate and verify them. Celko somehow involves watches and taxi cabs to illustrate the point.  Read more...
By Additional Articles 2011/06/20 | Source: SimpleTalk | Category: database design
Rating:  Rate this |   Briefcase | 2,643 reads

Stairway to Data, Level 1: The Basics

A great deal of the confusion that occurs when a database application is developed comes from a poor understanding of the basics of data. Here, Joe Celko gives a broad coverage of the difficulties you're likely to meet when handling data in databases  Read more...
By Joe Celko 2011/05/12 | Source: SQLServerCentral.com | Category: database design
Rating: |  Discuss |   Briefcase | 17,369 reads

A Developers' Guide to Refactoring Databases

When Agile meets 'Big Design', the result can be frustration on both sides. Is it possible for database development to to easily coexist with Agile methodologies for application development? Nick suggests that the technical solutions already exist, and the dissonance is more due to cultural and organizational problems  Read more...
By Additional Articles 2011/05/04 | Source: SimpleTalk | Category: check constraints
Rating:  Rate this |   Briefcase | 5,669 reads

An nHibernate Head Scratcher

An interesting mystery on why some nHibernate performance issues might exist on your systems. Read this piece from SQL Server expert David Poole and look to see if this is a problem you can easily solve in your environment.  Read more...
By David Poole 2011/04/11 | Source: SQLServerCentral.com | Category: performance tuning
Rating: |  Discuss |   Briefcase | 6,046 reads

Database Design Example: Curriculum Vitae

I’ve explained the database design process in a series of articles that you can find here. In this tutorial, I’ll put that information to good use and design a database from the start of the process to the finish. To keep this example to a single article, I’ll not repeat the information from those previous articles, so make sure you look those over before reading this one.  Read more...
By Additional Articles 2011/04/11 | Source: InformIT | Category: database design
Rating:  Rate this |   Briefcase | 5,142 reads
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