Deleting Top Records With An Order By Clause

Kevin Feasel

2018-09-20

T-SQL

Kenneth Fisher shows that deleting the top N records with an ORDER BY clause is not straightforward:

Did you know you can’t do this?

DELETE TOP (10)
FROM SalesOrderDetail
ORDER BY SalesOrderID DESC;

Msg 156, Level 15, State 1, Line 8
Incorrect syntax near the keyword ‘ORDER’.

I didn’t. Until I tried it anyway. Turns out, it says so right in the limitations section of BOL. Fortunately, that same section does have a recommendation on how to move forward.

Read on for a couple of methods to do this.

Related Posts

Considerations when Deleting Lots of Data

Ed Elliott takes us through things to think about before deleting a few million rows from a table: FragmentationFragmentation occurs when we delete from pages, and there is still data surrounding our data. If we have 100 rows and delete every odd row, we would have perfect fragmentation in that we have doubled the size […]

Read More

Puzzling Through Older Problems

Kenneth Fisher shares a couple of interview puzzles: The year is 2004. You’re taking a tech test as an interview for a SQL development job. They have a page in their application that displays up to 20 rows of information. They need a piece of code that will return the rows from a given page. […]

Read More

Categories

September 2018
MTWTFSS
« Aug Oct »
 12
3456789
10111213141516
17181920212223
24252627282930