Elapsed time between dates
The following functions returns the number of years, months and days between two dates. The first returns a table format, and the second returns 1 value at a time
2004-12-01 (first published: 2004-10-13)
234 reads
Additional Articles
"sysperfinfo" in SQL Server
The system table, "sysperfinfo," is the representation of the internal performance counters of SQL Server. This article demonstrates how to retrieve and store information from "sysperfinfo" to a CSV file, so that it can be analyzed.
2004-11-30
3,347 reads
Script to List Missing Identity Numbers
I have a table named employees with an identity column named id. Also,last_name is a column in the table named employees. I created the employeestable and inserted 9 rows in it. If I do a select * from employees, theoutput looks like this:id last_name1 a2 b3 c4 d5 e6 f7 g8 h9 iThen I deleted […]
2004-11-29 (first published: 2004-10-13)
157 reads
Data Sanitization Techniques
Data Sanitization is the process of making sensitive information in non-production databases safe for wider visibility. This White Paper is an overview of various techniques which can be used to sanitize sensitive production data in test and development databases.
2004-11-29
1,885 reads
Common Vulnerabilities in Database Security
Creating an enterprise security plan is a complex endeavour. It involves evaluating multiple threats that gain access through many network paths to a hodgepodge of different applications and systems. With the focus on systems and paths, databases are frequently overlooked. Securing the database should be a fundamental tenet for any security practitioner when developing his or her security plan. The database is the source of data, the "crown jewels" in the information economy. Any security effort must start with this in mind and end with the strongest level of controls applied at the database layer.
2004-11-26
2,129 reads
Easy and Fast way to check Backup details
Easy and Fast way to check Backup details. One line query to check backup status for all the databases. No need to go to each database or schedule job. Even you can use this query in customized application to get all the details on a single screen.
2004-11-25 (first published: 2004-10-14)
749 reads
Building a 24 x 7 Database
Over the last few years, corporations have invested billions of dollars to integrate the automations of core business systems in large ERP applications. This paper looks at the risk of downtime and solutions for building an around-the-clock database.
2004-11-24
2,129 reads
Updating Data in Linked Servers, Information Schema Views, and More
E
very day a developer somewhere needs to write code to iterate through SQL Server™ system objects, query and update tables in linked servers, handle optimistic concurrency, and retrieve column and stored procedure metadata. In this month's column, I will address these and other T-SQL development scenarios based on some of the questions I most frequently receive from readers.
2004-11-23
1,686 reads
Writing Secure Transact-SQL
There are plenty of good sources of information about how to deploy SQL Server in a secure fashion. However, these resources are often targeted at database administrators tasked with securing already developed applications. In addition, there is a rich body of information that discusses writing secure .NET and ASP.NET code, including .NET code that accesses SQL Server. However, many of these resources focus on the data access code that runs on the application servers rather than the Transact-SQL (T-SQL) code that executes within SQL Server. Developing T-SQL code that runs securely on SQL Server is the primary focus of this column.
2004-11-22
2,400 reads
Get all from Table A that isn't in Table B
A common requirement when building a data warehouse is to be able to get all rows from a staging table where the business key is not in the dimension table. For example, I may want to get all rows from my STG_DATE table where the DateID is not in DIM_DATE.DateID.
2004-11-19
4,068 reads
Blogs
DiskANN Experiment — Exploring Entry Points and Graph Neighborhoods
Introduction I was experimenting with vector search in SQL Server 2025 using approximately 3.8...
T-SQL Tuesday #203: Risk and Reward
By Steve Jones
This is timely, as I’m currently on a boat in the Adriatic taking a...
dataMinds Connect 2026 – Slides & Scripts
You can find the slides and SQL scripts for my session “Spice up your...
Forums
Training the next generation
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Reusing Customer Specific Order Filtering Logic with CROSS APPLY and an Inline TVF (Part 4)
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PostgreSQL psql Meta Commands: Databases
Comments posted to this topic are about the item PostgreSQL psql Meta Commands: Databases
Question of the Day
PostgreSQL psql Meta Commands: Databases
Which of the following meta commands (sometimes called backslash or slash commands) within psql will provide you with information about the databases on the cluster?
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