SQL Server +0 and -0
This is a very interesting error happened in one of my clients’ databases. Their database has been running for at...
2013-04-30
1,554 reads
John Huang’s Blog
SQL Saturday #198 Feb 16, 2013
SQL Saturday 198, http://www.sqlsaturday.com/198/ ; is coming to Vancouver Feb 16 this year. As of now, 56 sessions are collected from...
2013-01-09
816 reads
NULL Values Impact the Performance of MAX() and MIN()
We know that we need to take special attention about NULL values while writing queries because they may lead us into...
2012-12-26
2,209 reads
Inserted and Deleted are One Table?
Inserted and deleted tables are 2 pseudo tables preseting the before and after images of modified rows. They can only...
2012-10-17
2,413 reads
Update with UPDLOCK
Do you think it’s a good idea to add UPDLOCK hint to the table which will be modified in an...
2012-10-10
1,410 reads
Have You Seen This Error?
location: AppendOnlyVerStoreMgr.cpp:776
Expression: 0
SPID: 64
Process ID: 4912
Description: Cannot locate version record and page is not allocated. Status = 3
Msg 3624, Level 20,...
2012-09-10
1,212 reads
Get Dependent Databases, Tables, Columns…
Quite often people need to write a new T-SQL application to replace an existing one for various reasons. For instance,...
2012-07-06 (first published: 2012-06-29)
4,143 reads
Locking Behavior – Foreign Keys
With Snapshot (read committed snapshot and snapshot isolation level) enabled, when data reading on a table takes place, if any...
2012-06-26
2,738 reads
Bug? Can’t Pass TVP to SQL Function Twice
I run into a bug recently with SQL Server 2012. I believe this exists in SQL Server 2008 as well....
2012-06-20
1,083 reads
DBCC WritePage
DBCC WritePage is a dangerous undocumented DBCC command. It’s useful in your sandbox to change data, crash objects, and do...
2011-11-23
2,762 reads
Blogs
AI Step 1
By Vinay Thakur
As this is an Artificial Intelligence (AI) World, things are changing. We can see that...
Beginner’s Guide: Building a Dockerized Todo App with React, Chakra UI, and Rust for Backend
In a containerized app, React and Chakra UI provide a robust and accessible user...
A New Word: Nachlophobia
By Steve Jones
nachlophobia – n. the fear that your deepest connections with people are ultimately pretty...
Forums
Call dynamic sql storedprocedure from SSIS execute sql task
hi, I have a table called Rules Create table Rules ( Id int ,...
Migrating database with many orphan users.
I am currently upgrading a very old database running SQL Server 2008 to SQL...
Active and Active Cluster
Hi Team, I am planning to apply security updates for SQL Server 2016 on...
Question of the Day
The Funny SELECTs
What is returned from this query?
SELECT
( SELECT COUNT (*) FROM Sales.SalesOrderHeader AS soh
WHERE soh.OrderDate >= '01/01/2011' AND soh.OrderDate < '01/01/2012') AS OrdersIn2011
, ( SELECT COUNT (*) FROM Sales.SalesOrderHeader AS soh
WHERE soh.OrderDate >= '01/01/2012' AND soh.OrderDate < '01/01/2013') AS OrdersIn2012
, ( SELECT COUNT (*) FROM Sales.SalesOrderHeader AS soh
WHERE soh.OrderDate >= '01/01/2013' AND soh.OrderDate < '01/01/2014') AS OrdersIn2013; See possible answers