Which One is Better? IN or BETWEEN?
I just had an interesting case of performance tuning: a query with multiple predicates on a very large table. Something...
2018-03-21 (first published: 2018-03-09)
4,131 reads
I just had an interesting case of performance tuning: a query with multiple predicates on a very large table. Something...
2018-03-21 (first published: 2018-03-09)
4,131 reads
Let’s say you have a very large table on a SQL Server 2012 Standard Edition instance. This means: old cardinality...
2018-03-02
380 reads
This wait type indicates that parallel plans execute on the server. This wait type doesn’t necessarily means there is a...
2018-03-02
828 reads
Usually, when I need to troubleshoot currently running requests, I use a combination of sys.dm_exec_requests and sys.dm_os_waiting_tasks. The former retrieves...
2018-02-01
507 reads
Houston, We Have a Problem
We are living in a crazy world. And it just gets more and more crazy all...
2018-01-28
846 reads
Let’s say you need to create a new SQL Server database, which is going to grow very fast, but you...
2018-01-18 (first published: 2018-01-08)
1,762 reads
There is a growing need for Graph Databases in the market. This is a type of database, which is capable...
2018-01-08
552 reads
SQL Server 2017 brings a new interesting feature, that might be a game changer in some environments. I’m talking about...
2017-12-25
581 reads
I had the honor to visit Nepal and participate in SQL Saturday Nepal 2017. You can visit the event website...
2017-12-23
481 reads
In show #84 of the SQL Server Radio Hebrew Edition, Matan and I talked about how to calculate running totals in SQL...
2017-12-01 (first published: 2017-11-19)
2,879 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