Subquery

External Article

Three Use Case Examples for SQL Subqueries

  • Article

There are many great tutorials on syntax, performance, and keywords for invoking subqueries. However, I wish to discover a tip highlighting selected SQL subquery use cases. Please briefly describe three SQL subquery use case examples. For each use case, cover how a subquery interacts with outer queries and the T-SQL for implementing the use case. Review excerpts from each example to show the value of implementing the use case.

2023-04-14

Stairway to T-SQL Beyond The Basics

Stairway to T-SQL: Beyond The Basics Level 3: Building a Correlated Subquery

  • Stairway Step

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.

3.67 (3)

You rated this post out of 5. Change rating

2019-05-08 (first published: )

20,212 reads

Blogs

A New Word: Apolytus

By

apolytus– n. the moment you realize you are changing as a person, finally outgrowing...

Tired of Tedious SQL Queries? AI Tools Can Automate The Boring Parts

By

If you've ever wrestled with complex SQL code, you know the drill. Hours spent...

Check your regions people

By

Today I was having a nice discussion with some colleagues about Fabric and pricing/licensing...

Read the latest Blogs

Forums

Table Partitioning - remove null range

By goher2000

hi guys,   I have a partitioned table AM_ITM_INSTNC_MSS and I want to  get...

Principal owns a service?

By Brandie Tarvin

This is one I haven't seen before. I'm trying to drop a database user...

Issues backing up Analysis Services databases - silent failures

By Pete Bishop

I have a PowerShell script that I use to automate the backup of Analysis...

Visit the forum

Question of the Day

Read Only Replica in SQL Server Standard

Our environment runs using SQL Server Standard. We are implementing Availability groups. Our database has been experiencing high read volumes, so I want to let the application read the Synchronized Secondary replica, as I read that HADR does this. Can we implement this?

See possible answers