A common requirement when building a data warehouse is to be able to get all rows from a staging table where the business key is not in the dimension table. For example, I may want to get all rows from my STG_DATE table where the DateID is not in DIM_DATE.DateID.
Taking a break from SQL Server and DTS, author Haidong Ji shares a few tips and tricks to becoming more productive, whether as a DBA or developer. These hints and tips could help you separate yourself from the pack come review, raise, or interview time.
SQL Server string manipulation using T-SQL leaves lots to be desired. Many postings and complaints about T-SQL deal with strings, but there are ways to work with it. Author Eli Leiba brings us a way to split out portions of a string that contains tokens with a user defined function. Read on to see how this is accomplished and the code used to perform the splitting.
We take a look at each of the major components of a SQL Server's hardware, and examine what can be done to help maximize the performance of your hardware.
In the Database administration world, it is often necessary to run a query on the production box and then run the same query on the QA or UAT box and compare the results. In this article, I would like to introduce a method that takes advantage of an MS-DOS batch file and SQL Server utility, BCP.exe, to compare the query results executed on two different servers.
So you open up the tool a hundred times a day. In this article by Brian Kelley, he shows you how to get the most out of some of the known and unknown features.
There is nothing spectacular about using indexes per say. However, on many occasions I have come across a variety of SQL coders that never consider validating that the index they think they are using is efficient or even being used at all. We can all put indexes on the columns that we think will be required to satisfy individual queries, but how do we know if they will ever be used. You see, if the underlying table data is constructed, contains, or is ordered in a particular way, our indexes may never be used. One of the factors around the use of an index is its clustering factor and this is what this article is about.
This article is a member of the series Introduction to MSSQL Server 2000 Analysis Services. The series is designed to provide hands-on application of the fundamentals of MS SQL Server 2000 Analysis Services, with each installment progressively adding features and techniques designed to meet specific real - world needs.
Every once in awhile there is a unique T-SQL solution in SQL Server that solves a rare problem. Not many of us have had to deal with boolean evaluation in our jobs, but a few have. Author Eli Leiba has and brings us a new article that shows how to build a procedure that can take a boolean expression and evaluate it to true or false.
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...
Comments posted to this topic are about the item Fun with JSON II
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Comments posted to this topic are about the item Answering Questions On Dropped Columns
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