Changing Data Types
Steve had to deal with a customer that changed data types in columns often. Is that something you experience?
2026-03-18
36 reads
Data Types
Common SQL Server Problems: Invalid Length
This is another part in my series designed to offer guidance around common issues in SQL Server. Today, let’s talk about the all-too-common error: invalid length.
2026-02-04
2025-09-12
1,680 reads
2025-02-14
513 reads
2025-01-31
458 reads
2025-01-15
1,860 reads
GUID in SQL Server
This tip's objective is to present and describe several T-SQL examples for creating, using, and analyzing GUIDs and assessing their uniqueness.
2024-12-30
2024-03-13
442 reads
2023-11-08
449 reads
How to get length of Text, NText and Image columns in SQL Server
There is sometimes a need to figure out the maximum space that is being used by a particular column in your database. You would initially think that the LEN() function would allow you to do this, but this function does not work on Text, NText or Image data types, so how do you figure out the length of a value in a column that has one of these data types?
2022-04-20
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Fun with JSON II
Comments posted to this topic are about the item Fun with JSON II
Changing Data Types
Comments posted to this topic are about the item Changing Data Types
Question of the Day
Fun with JSON II
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