SQL Server provides the UNION, EXCEPT, and INTERSECT set operations. How do they work and how can they be used in SQL Server? Can you provide any examples? Check out this tip to learn more.
2013-11-25
5,224 reads
You may come across or even inherit a system where many of the users have different default schemas. Usually, this is easy to remedy - you go into Management Studio, right-click the user, and change the default schema through the UI. Or you write an ALTER USER command manually. But what if you have hundreds of users, across all of your user databases, that should all have the same default schema?
2013-11-22
3,684 reads
In this series on implementing data services in Azure, Marcin Policht turns his attention to the remediation of incompatibilities resulting from of limitations inherent to Platform as a Service (PaaS) based deployments, which will need to be addressed as part of the migration process.
2013-11-21
3,052 reads
For loading text, CSV or XML files into SQL Server, the Log Parser utility, with its amazing SQL engine, is likely to be the obvious choice. Although initially developed purely for converting IIS logs, the Log Parser can turn its hand to a range of formats including even event logs or the Windows registry.
2013-11-20
2,923 reads
Understanding indexes and how they work can be complicated enough for a Jr. DBA, but throw in all the different options and properties and an index can soon be overwhelming. Brady Upton takes an introductory look at creating an index in SQL Server using SQL Server Management Studio. He explains what each index property is meant for and the various options presented.
2013-11-19
4,619 reads
Are you a SQL Server DBA who is now being asked to migrate databases to Windows Azure SQL Database (WASD)? Are you a developer who is writing code for a cloud service that shall use SQL Database as the back-end? This blog post is based on issues encountered while supporting customers that were once in your shoes and the lessons learned in the process.
2013-11-18
3,173 reads
This article is a whistle-stop tour of my exploration of latches; their different types, their purposes, why they are required and where they fit into the SQL database engine, in the hope it will be interesting and useful to you.
2013-11-15
4,623 reads
SQL's windowing functions are surprisingly versatile, and allow us to cut out all those self-joins and explicit cursors. Joe Celko explains how they are used, and shows a few tricks such as calculating deltas in a time series, and filling in gaps.
2013-11-14
7,422 reads
In-Memory table or what Microsoft refers to as In-Memory OLTP, or Hekaton is a new type of table is available with SQL Server 2014. In this article Greg Larsen discusses the different types of indexes you can place on your In-Memory tables, and how those indexes support different search criteria.
2013-11-13
2,920 reads
This tip will guide you through a simple example to illustrate how you can use the SQL Server Distributed Replay feature to replay a simple SQL Server trace file that contained two sessions executing statements concurrently.
2013-11-12
1,971 reads
By Brian Kelley
I will be leading an in-person Certified Information Systems Auditor (CISA) exam prep class...
EightKB is back again for 2026! The biggest online SQL Server internals conference is...
By HeyMo0sh
Working in DevOps long enough teaches you two universal truths: That’s exactly why I...
Hi all, I just started using VS Code to work with DB projects. I...
Comments posted to this topic are about the item Fun with JSON II
Comments posted to this topic are about the item Changing Data Types
I have some data in a table:
CREATE TABLE #test_data
(
id INT PRIMARY KEY,
name VARCHAR(100),
birth_date DATE
);
-- Step 2: Insert rows
INSERT INTO #test_data
VALUES
(1, 'Olivia', '2025-01-05'),
(2, 'Emma', '2025-03-02'),
(3, 'Liam', '2025-11-15'),
(4, 'Noah', '2025-12-22');
If I run this query, how many rows are returned?
SELECT t1.[key] AS row,
t2.*
FROM OPENJSON(
(
SELECT t.* FROM #test_data AS t FOR JSON PATH
)
) t1
CROSS APPLY OPENJSON(t1.value) t2; See possible answers