My last two blogs were on understanding columnstore and creating columnstore indexes. In this post, I will touch on one last topic, when to use columnstore indexes. As noted...
2019-08-05 (first published: 2019-07-17)
635 reads
In my last blog I explained what a columnstore index is, in this blog, we will dive into creating a clustered columnstore index and look at the performance differences...
2019-07-31 (first published: 2019-07-10)
542 reads
Recently I reviewed filtered indexes, this time let’s look at columnstore indexes. These indexes are very useful for data warehouse workloads and large tables. They can improve query performance...
2019-07-11 (first published: 2019-06-26)
1,244 reads
When you run a query twice, and get dramatically different run times, your first step can be to try to identify the differences in execution plans. For many that...
2019-07-05 (first published: 2019-06-19)
918 reads
In this post, we continue with another beginner’s blog of database features that may be unknown to many. Let’s take a look at filtered indexes. Many database administrators are...
2019-06-10 (first published: 2019-05-22)
755 reads
I give performance presentations at many different events to all levels of SQL Server professionals. Over time I’ve noticed that some DBAs and developers have never looked at the...
2019-05-29 (first published: 2019-05-15)
2,078 reads
I am very excited to announce I will be delivering a pre-conference session on SQL Server Performance Tuning on November 5th at PASS Summit 2019. If you have ever...
2019-04-24
75 reads
Another quick post of simple changes you can make to your code to create more optimal execution plans. This one is on implicit conversions. An implicit conversion is when...
2019-04-29 (first published: 2019-04-17)
1,129 reads
One of the easiest things to fix when performance tuning queries are Key Lookups or RID Lookups. The key lookup operator occurs when the query optimizer performs an index...
2019-04-17 (first published: 2019-04-03)
716 reads
March is Women’s History Month, to celebrate the PASS Women in Technology Virtual Group (@PASS_WIT) held a webcast featuring prominent...
2019-04-09 (first published: 2019-03-20)
1,031 reads
By Steve Jones
fardle-din – n. a long-overdue argument that shakes up a relationship, burning wildly through...
The post Lukáš Karlovský: I got the green light from management and built Fabric...
By Steve Jones
I had mentioned some new T-SQL functions for SQL Server 2022 and a commenter...
Has anyone done a migration from sharepoint integrated ssrs to native? I'm not finding...
Hey All, My setup is as follows: Table with Clustered Index on ID col....
I am having problems with CPU performance on SQL Server 2005. CPU spikes frequently...
What is wrong (if anything) with this code?
SELECT *
FROM Sales.SalesOrderHeader AS soh
WHERE customerid IN (SELECT soh.CustomerID
FROM Sales.Customer AS C
WHERE soh.CurrencyRateID = 1
ORDER BY c.ModifiedDate)
See possible answers