How to Perform Database Hack-Attach
This blog demonstrates attaching a database on the SQL Server Instance which already has the same name database up and...
2018-04-23
1,818 reads
SQL Geek
Finding Untrusted Foreign Keys and Constraints
In the previous blog, we discussed the Foreign Keys Constraints and how the CHECK Constraints are useful to verify the...
2018-04-30 (first published: 2018-04-19)
3,158 reads
Find Missing Indexes For All SQL Server Databases
DMV (Database Management View) and DMO (Database Management Objects) were added in 2005. There have been huge improvements in each...
2018-04-16
26,087 reads
SQL Server Logical Query Processing
Recently, while reviewing one of the stored procedure performance, I suggested a couple of changes to a developer to improve...
2018-04-12
19,761 reads
How to Check SQL Server View Utilization
If you are working on SQL Server optimization delicately, you may get often queries that how to find if any...
2018-04-09
966 reads
What is a Foreign Key & How many foreign keys can you have on a single table?
Yesterday, I was attending a database design meeting. In the meeting, I was asked one of the questions – “How many...
2018-04-12 (first published: 2018-04-05)
12,094 reads
How SQL Compilation Can Prove the Server CPU
It is relatively easy to spot CPU-bound system. But, the source of CPU pressure is not always easy to pinpoint....
2018-04-02
1,253 reads
SQL Performance – Using Query Hint OPTION (FAST N)
It is fun working with SQL/Application developer where you exchange a lot of technical thoughts to find the root of...
2018-03-21
7,322 reads
New Built-in Function CONCAT_WS() – SQL Server 2017
In my previous post on new functions in SQL Server 2017, I discussed about the STRING_AGG function. Here, I am...
2018-03-02
1,380 reads
Set New Errorlog File location – SQL Server on Linux
For SQL Server 2017 RTM, the fourth cumulative update was released on 20th February, and it is available for download...
2018-03-08 (first published: 2018-03-01)
1,599 reads
Blogs
Automatic Index Compaction
By ReviewMyDB
Index maintenance has always meant nightly jobs and a window you have to defend....
The Goldilocks problem – Materialized Views
I’m sure you’ve all heard the tale of Goldilocks and the Three Bears, but...
Monday Monitor Tips: Virtual Machine Usage and Cost
By Steve Jones
One of the things I’ve been requesting for a number of years is cost...
Forums
SQL Art, Part 4: Happy 4th of July — A British DBA's Guide to Celebrating a War We Don't Talk About
Comments posted to this topic are about the item SQL Art, Part 4: Happy...
How We Handled a Vendor Retry That Loaded Twice in Snowflake
Comments posted to this topic are about the item How We Handled a Vendor...
Cognitive Coverage
Comments posted to this topic are about the item Cognitive Coverage
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