Gregory Larsen

Currently a SQL Server DBA. I've been working with SQL Server since 1999. I'm an old-time mainframe DBA. My DBA career started in 1985. Currently studying to obtaining MCDBA.

Stairway to T-SQL DML

Stairway to T-SQL DML Level 5: The Mathematics of SQL: Part 2

Joining tables is a crucial concept to understanding data relationships in a relational database. When you are working with your SQL Server data, you will often need to join tables to produce the results your application requires. Having a good understanding of set theory, and the mathematical operators available and how they are used to join tables will make it easier for you to retrieve the data you need from SQL Server.

5 (1)

2019-05-29 (first published: )

16,741 reads

Stairway to T-SQL DML

Stairway to T-SQL DML Level 4: The Mathematics of SQL: Part 1

A relational database contains tables that relate to each other by key values. When querying data from these related tables you may choose to select data from a single table or many tables. If you select data from many tables, you normally join those tables together using specified join criteria. The concepts of selecting data from tables and joining tables together is all about managing and manipulating sets of data. In Level 4 of this Stairway we will explore the concepts of set theory and mathematical operators to join, merge, and return data from multiple SQL Server tables.

5 (6)

2019-05-22 (first published: )

22,528 reads

Stairway to T-SQL Beyond The Basics

Stairway to T-SQL: Beyond The Basics Level 9: Dynamic T-SQL Code

There times when you need to write T-SQL code that creates specific T-SQL Code and executes it. When you do this you are creating dynamic T-SQL code. When writing dynamic T-SQL you need to understand how dynamic code opens the possibilities for a SQL injection attack.

2016-07-29 (first published: )

12,292 reads

Stairway to T-SQL Beyond The Basics

Stairway to T-SQL: Beyond The Basics Level 4: Using Views to Simplify Your Query

This level discusses how to use a database VIEW to simplify your Transact-SQL(T-SQL) code. By understanding how to use a VIEW you will be able to better support writing T-SQL code to meet complex business requirements. In this article I will be discussing what a database VIEW is and then providing a number of examples to help you understand how you can use a VIEW to implement different coding scenarios.

2016-07-22 (first published: )

12,920 reads

Stairway to T-SQL Beyond The Basics

Stairway to T-SQL: Beyond The Basics Level 8: Coding Shortcuts using += and -= Operators

No one wants to use more keystrokes than they have to when they write a chunk of T-SQL code. To help with minimizing the number of characters a T-SQL developer needs to type the Microsoft team introduced three new shortcuts operators when they release SQL Server 2008. These shorts cuts are the String Concatenation, Add EQUALS, and the Subtract EQUALS operators.

2016-07-15 (first published: )

14,326 reads

Stairway to T-SQL Beyond The Basics

Stairway to T-SQL: Beyond The Basics Level 6: Using the CASE Expression and IIF Function

There are times where you need to write a single T-SQL statement that is able to return different T-SQL expressions based on the evaluation of another expression. When you need this kind of functionality you can use the CASE expression or IIF function to meet this requirement. In this Stairway level Gregory Larsen reviews the CASE and IIF syntax and showing you examples of how the CASE expression and IIF function.

2016-04-20 (first published: )

17,120 reads

Stairway to T-SQL Beyond The Basics

Stairway to T-SQL: Beyond The Basics Level 5: Storing Data in Temporary Tables

There are times when retrieving data for complex business requirement requires you to temporarily store one or more results sets for a short period of time. Typically these temporary tables are stored in the scope of the current connection, but they may also need to be available across multiple connections.

2016-03-18 (first published: )

14,688 reads

Blogs

How SQL Server stores data types: DATETIMEOFFSET

By

If you’d like to check out the previous instalment in this series on storing...

Daily Coping 16 Jun 2021

By

I started to add a daily coping tip to the SQLServerCentral newsletter and to...

Server Review Essentials for Accidental and Junior DBAs—Prepping for Server Reviews

By

Welcome back to our series, Server Review Essentials for Accidental and Junior DBAs, where...

Read the latest Blogs

Forums

Add On-Demand Subreport

By Luv SQL

This is so very easy to do in Crystal Reports.  You add subreport hidden...

suggestions on making more efficient and faster

By Bruin

I have a piece of code that I would like some suggestions on how...

Looking for a way to change all objects at once?

By itmasterw 60042

Hi, I have a field in a table called prin_ball, upon doing a search...

Visit the forum

Ask SSC

SQL Server Q&A from the SQLServerCentral community

Get answers