Stairway to Advanced T-SQL Level 10: Using Scalar Functions
Learn about scalar user defined functions in this next level in the Stairway.
2020-10-21 (first published: 2020-10-08)
3,518 reads
Gregory Larsen
2020-06-23
840 reads
2020-06-22
477 reads
2020-06-01
688 reads
2020-05-28
650 reads
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.
2019-05-29 (first published: 2011-11-30)
18,077 reads
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.
2019-05-22 (first published: 2011-11-16)
24,364 reads
Stairway to T-SQL: Beyond The Basics Level 3: Building a Correlated Subquery
This stairway level will expand on the subquery topic by discussing a type of subquery known as a correlated subquery, and explores what a correlated subquery is and how it is different from a normal subquery.
2019-05-08 (first published: 2014-03-05)
20,458 reads
Stairway to T-SQL DML Level 12: Using the MERGE Statement
The final level of this stairway looks at the MERGE statement in detail, focusing on how to perform insert, update and delete logic using the MERGE statement.
2019-03-26 (first published: 2013-01-16)
21,599 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.
2019-03-26 (first published: 2011-11-09)
18,017 reads
Blogs
Excel to SQL: Ditch the Spreadsheet Headaches
If you're a data analyst drowning in Excel, you know the pain. Endless filtering,...
Securing Kubernetes With External Secrets Operator on AWS
Here’s a way to centralize management, rotate secrets conveniently without downtime, automate synchronization and...
Save Azure PostgreSQL Backup to Storage
This may or may not be helpful in the long term, but since I’m...
Forums
Dynamic T-SQL Script Parameterization Using Python
Comments posted to this topic are about the item Dynamic T-SQL Script Parameterization Using...
Pitfalls to avoid while feeding events into CrowdStrike
Comments posted to this topic are about the item Pitfalls to avoid while feeding...
Column Adds and Drops
Comments posted to this topic are about the item Column Adds and Drops
Question of the Day
Column Adds and Drops
I run this batch on SQL Server 2022. What happens?
ALTER TABLE dbo.Accounts ADD AccountAccessType INT GO ALTER TABLE dbo.Accounts DROP AccountAccessType GOSee possible answers