Delete Duplicate Rows with No Primary Key on a SQL Server Table

Every once in awhile a table gets created without a primary key and duplicate records get entered. The problem gets even worse when you have two identical rows in the table and there is no way to distinguish between the two rows. So how do you delete the duplicate record?

Half Of You Don’t Understand Variables and Transactions.

Do table variables and variables respect transactions? If we set the value of a variable during a transaction, and we roll it back, what happens?

Creating and Using Inline Table-Valued Functions

Inline Table Valued Functions (iTVFs) are one type of user defined function that is available to implement in SQL Server since SQL Server 2000.

iTVFs remain a very useful tool in our SQL armoury, so let's quickly revisit them and the different ways we can use them in our code.

Avoiding the transaction

Database Modeling - Relationships

A proper relationship between two people, places or things improves the communication between them. In every real-world based application, this logic holds and a database is no different. This article discusses the different relationship types possible between database objects. The designing of these relationships between them is called modeling, and the three types of relationships […]

Compare Artificial Intelligence Models Built with T-SQL

This tip looks at using artificial intelligence models with SQL Server to predict outcomes.

The Binary Cast

Getting Subtotals

SSIS Variable and Parameter Analysis

Use T-SQL to analyse the usage of all variables and parameters in an SSIS project, including the identification of any unused variables and parameters.

The Last Sequence