2024-12-06
624 reads
Subquery
Three Use Case Examples for SQL Subqueries
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
2019-11-08
1,139 reads
SQL Server Subquery in Select Statement with Where Clause
In this part of the temporary data store tip series we look at using subqueries to select data as well as how to use for inserts, updates and deletes.
2019-05-22
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)
20,578 reads
2013-05-09
2,232 reads
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2,359 reads
2013-01-11
2,715 reads
2011-09-19
3,104 reads
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Which Result II
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Question of the Day
Which Result II
I have this code in SQL Server 2022:
CREATE SCHEMA etl;
GO
CREATE TABLE etl.product
(
ProductID INT,
ProductName VARCHAR(100)
);
GO
INSERT etl.product
VALUES
(2, 'Bee AI Wearable');
GO
CREATE TABLE dbo.product
(
ProductID INT,
ProductName VARCHAR(100)
);
GO
INSERT dbo.product
VALUES
(1, 'Spiral College-ruled Notebook');
GO
CREATE OR ALTER PROCEDURE etl.GettheProduct
AS
BEGIN
exec('SELECT ProductName FROM product;')
END;
GO
exec etl.GettheProduct
When I execute this code as a user whose default schema is dbo and has rights to the tables and proc, what is returned? See possible answers