Taking SQL art from shamrocks and Easter eggs to something your DBA manager might actually care about. If you've been following my SQL spatial art series — shamrocks, Easter eggs, Christmas trees — you'll know I have a habit of finding increasingly creative misuses for SQL Server's geometry data type. Most of them have been […]
2026-06-12
4,722 reads
This article explores how enabling READ_COMMITTED_SNAPSHOT on your SQL Server database might ease excessive blocking.
2024-08-19
Learn about how SQL Server uses locks when modifying data and how data is committed to a database after data changes.
2023-10-23
Learn about the impact of locking and blocking in sessions through some demonstrations of different types of actions.
2020-06-11
8,367 reads
Systems with a large number of requests on a critical database table are prone to blocking and slowness. We take a look at getting things done using T-SQL table hints.
2017-06-20
3,693 reads
2015-08-10 (first published: 2015-07-16)
1,589 reads
This script will help you to get the culprit along with IP address and User name which helps us to determine the Blocking root cause.
2015-10-14 (first published: 2013-12-08)
4,450 reads
Problems with blocking processes can be easy to identify with SQL Server DMV's.
2013-09-19
7,375 reads
This metric reports the number of connections that are currently blocked, divided by the total count of current connections.
Most well-balanced SQL Servers will have some degree of blocking. This metric attempts to measure the impact of lead blocking queries against other queries. Higher values indicate that many connections are being blocked, and queries should be tuned to reduce the amount of contention.
2013-06-07
3,144 reads
In this tip, Basit Farooq shares a query written using dynamic management views (DMVs) that will help you to quickly identify SPIDs and other useful information about the processes that are causing blocking on a SQL Server instance.
2013-05-01
6,231 reads
By Steve Jones
I use ConEmu for my terminal interface. I’m still on Windows 10 at home,...
Creating a Fabric workspace takes about 30 seconds. Restructuring workspaces after people have built...
By Steve Jones
It’s a small change, but a handy one. Flyway Desktop (FWD) now includes the...
Comments posted to this topic are about the item Adding new column with DEFAULT...
Comments posted to this topic are about the item Advanced Deployment Scenarios: Stairway to...
Comments posted to this topic are about the item You Need a DBA Pipeline
Which number did the two COUNT(*) return:
DROP TABLE IF EXISTS #tmp CREATE TABLE #tmp (id INT NOT NULL) INSERT INTO #tmp (id) SELECT gs.value FROM GENERATE_SERIES(1, 5) AS gs ALTER TABLE #tmp ADD my_value INT NOT NULL CONSTRAINT df_tmp_my_value DEFAULT 1 SELECT COUNT(*) FROM #tmp AS t WHERE my_value = 1 ALTER TABLE #tmp DROP CONSTRAINT df_tmp_my_value ALTER TABLE #tmp ADD CONSTRAINT df_tmp_my_value DEFAULT 2 FOR my_value SELECT COUNT(*) FROM #tmp AS t WHERE my_value = 1See possible answers