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.

Blogs

Monday Monitor Tips: Intelligent Alert Thresholds

By

At the recent Redgate Summit in Chicago, I demo’d (lightly) the ML based Alert...

A New Word: los vidados

By

los vidados – n. the half-remembered acquaintances you knew years ago, who you might...

In-Person CISA Training – April 13-16, 2026

By

I will be leading an in-person Certified Information Systems Auditor (CISA) exam prep class...

Read the latest Blogs

Forums

String_agg not working as needed

By DaveBriCam

I'm trying to get this string_agg to put all the 'comments' into one result...

Vectors in SQL Server 2025

By Daniel Calbimonte

Comments posted to this topic are about the item Vectors in SQL Server 2025

Odd Sequences

By Steve Jones - SSC Editor

Comments posted to this topic are about the item Odd Sequences

Visit the forum

Question of the Day

Odd Sequences

What values are returned from this code?

CREATE SEQUENCE NumericSequence
    AS NUMERIC(5,1)
    START WITH 1.0
    INCREMENT BY 0.1;
GO
SELECT NEXT VALUE FOR NumericSequence
GO
SELECT NEXT VALUE FOR NumericSequence
GO

See possible answers