A Tale of Identifiers

Posted on Simple Talk See other posts from Simple Talk
Published on Thu, 09 Jun 2011 00:00:00 GMT Indexed on 2011/06/20 16:34 UTC
Read the original article Hit count: 230

Filed under:

T-SQL Programming

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.

A Tale of Identifiers

Posted on SQL Server Central See other posts from SQL Server Central
Published on Mon, 20 Jun 2011 06:00:00 UT Indexed on 2011/06/20 16:33 UTC
Read the original article Hit count: 230

Filed under:

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.

Related posts about T-SQL Programming

SQL SERVER – Concat Strings in SQL Server using T-SQL – SQL in Sixty Seconds #035 – Video

as seen on SQL Authority - Search for 'SQL Authority'
Concatenating string is one of the most common tasks in SQL Server and every developer has to come across it. We have to concat the string when we have to see the display full name of the person by first name and last name. In this video we will see various methods to concatenate the strings. SQL… >>> More
Writing A Transact SQL (TSQL) Procedure For SQL Server 2008 To Delete Rows From Table Safely

as seen on Dot net Slackers - Search for 'Dot net Slackers'
In this post, we will show and explain a small TSQL Sql Server 2008 procedure that deletes all rows in a table that are older than some specified date. That is, say the table has 10,000,000 rows in it the accumulated over the past 2 years. Say you want to delete all but [...]...Did you know that… >>> More
difference between tsql, access sql and pl/sql

as seen on Stack Overflow - Search for 'Stack Overflow'
i am very confused please help to clarify these differences! are they all completely different languages? what is the overlap? >>> More
SQLAuthority News – Microsoft SQL Server Protocol Documentation Download

as seen on SQL Authority - Search for 'SQL Authority'
The Microsoft SQL Server protocol documentation provides detailed technical specifications for Microsoft proprietary protocols (including extensions to industry-standard or other published protocols) that are implemented and used in Microsoft SQL Server to interoperate or communicate with Microsoft… >>> More
SQL SERVER – Interview Questions & Answers Needs Your Help

as seen on SQL Authority - Search for 'SQL Authority'
About an year ago, I had posted SQL Server related Interview Questions and Answers. It was very well received in community. I have received many comments, suggestions and emails on this subject. I am planning to upgrade the Interview Questions and Answers and take it to next level. Here, I need your… >>> More

Developer IT