Answering Questions On Dropped Columns
Howdy folks! Long time no write.
In this post, I will be answering a couple of questions from the previous posts about dropping columns.
A quick refresh
If you haven’t read the...
2026-04-19
5 reads
Cláudio Silva
- Website: https://claudioessilva.eu
Answering Questions On Dropped Columns
Answering a couple of questions from the previous posts about dropping columns.
2026-03-18
2,031 reads
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2025-04-14
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Answering Questions On Dropped Columns
Howdy folks! Long time no write.
In this post, I will be answering a couple of questions from the previous posts about dropping columns.
A quick refresh
If you haven’t read the...
2025-03-10
5 reads
How much space can I expect to recover from a rebuild after dropping a column?
In my last article - Identify Tables With Dropped Columns - we saw how we can identify tables that have columns that were dropped. Today, we are going to...
2024-08-05
28 reads
What happens when we drop a column on a SQL Server table? Where's my space?
You have dropped a column and wondering why you haven't recovered any space? Let's take a look.
2024-08-01 (first published: 2024-04-26)
4,932 reads
Identify Tables With Dropped Columns
On my last article - What happens when we drop a column on a SQL Server table? Where’s my space? - I have shown what happens when we drop...
2024-07-22 (first published: 2024-07-09)
363 reads
How much Space can I expect to recover from a rebuild after dropping a column?
Check how much space you may expect to recover from a rebuild after dropping a column!
2024-07-05
1,240 reads
Identify Tables With Dropped Columns
How easily can we find tables with dropped columns that need cleanup?
2024-06-07
2,578 reads
What happens when we drop a column on a SQL Server table? Where's my space?
This article was initially posted on SQLServerCentral @ 2024-04-26.
Short answer: The column is marked as ‘deleted’ and will stop being visible/usable.
But, most importantly - The record/table size will remain...
2024-05-29
267 reads
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Question of the Day
Getting the Average
I have this data in the dbo.Commission table in a SQL Server 2022 database.
salesperson commission Brian 12 Brian 16 Andy 7 Andy 14 Andy 21 Steve 20 Steve NULLAll the data is a varchar, and I decide to run this query to get the totals for each salesperson.
SELECT SalesPerson
, AVG(TRY_PARSE(Commission AS int)) AS TotalCommission
FROM commission
GROUP BY SalesPerson
GO
What average commission is calculated for Steve? See possible answers