Depending on the width of the rows and the number of indexes on the table, deleting a day's worth of rows should typically take no more than...

How many rows are added to the table each day? And how many rows are currently in the table?

I’ve revised my original response to correct the delete statement - perhaps it could serve as an example.

I’ve also added WITH (NOLOCK) on the...

This is throwing an error:

-- Populate the batch table with the next set of IDs to delete DELETE TOP (@BatchSize) OUTPUT DELETED.Id INTO #BatchToDelete FROM #ToDelete;

Msg 102, Level 15,...

Certainly! Simply include the criteria in the WHERE clause of...

When performing deletions on large tables, it is essential to delete rows using the clustered index (in this case, PK(Id)) and process the deletions in small batches. This approach ensures:

Efficiency:...

• This reply was modified 1 month, 2 weeks ago by  Jonathan AC Roberts. Reason: Correct delete from batch, and added NOLOCK to ID select

Not quite the same result but has all the info:

SELECT *
  FROM #STOCKS1 AS T1 
  FULL JOIN #STOCKS2 AS T2 
   ...

Thank you, Scott and Frederico, for the helpful advice!

I’ll take a closer look at the query plan tomorrow to verify whether it’s performing a seek or just a scan. I’ll...

Thank you for the detailed reply - it’s very helpful!

Just to clarify, the queries themselves don’t specify TENANTID in the WHERE clause. Instead, row-level security handles tenant filtering through

            
November 12, 2024 at 7:05 pm
            
#4480757

            
            
                                                
        

Thank you, Scott, for the helpful advice! I’d like to dive a bit deeper into point (2) to better understand how partitioning impacts performance in a multi-tenant setup. I’m new...

Here you are courtesy of ChatGPT:

Yes, it’s possible to run specific stored procedures (SP1 and SP2) in parallel and then have SP3 and SP4 execute in series within a main...

I would use EXISTS instead of IN

update m 
   set val = 'TEST' 
  from #MDM m
 where exists(SELECT 1
    ...

Try running the data transfer in multiple parallel sessions in SSMS, using chunked INSERT INTO ... SELECT queries. Open two or three SSMS windows, and in each, execute a separate...

Jeff,

The "url" link to the excellent article at the beginning of this discussion isn't working. I believe it should point to https://www.sqlservercentral.com/articles/hidden-rbar-triangular-joins, but only you have the ability...

First and foremost, stop dropping and rebuilding indexes, I don't care how bad the fragmentation is.  Even 90% logical fragmentation makes little difference.  What DOES make a difference is...