Database Normalization in SQL with Examples
Gouri Shankar provides an overview of normalizing a database.
2020-02-18
88,660 reads
T-SQL
Handling Aggregations on a Poorly Designed Database
When the database design is not great, you may have to write some creative queries to get what you need.
2020-02-17
3,462 reads
Calculate Moving Averages using T-SQL in SQL Server
Introduction In Financial Data, analyzing the Moving Average (MA) is a very common practice. The direction of the moving average conveys important information about prices, whether that average is simple or exponential. A rising moving average shows that prices are generally increasing. A falling moving average indicates that prices, on average, are falling. This article […]
2020-02-04
23,062 reads
Prevent SQL Server Blocking using Lock_Timeout
In this tip we look at a way to minimize the length of blocking using SQL Server lock timeout.
2020-01-24
T-SQL script to purge all the tables including foreign key references
T-SQL script to purge all the tables including foreign key references. The script has been made smart enough to use TRUNCATE wherever there is no foreign key reference and to use DELETE wherever there is foreign key reference.
2019-12-10
2,598 reads
SQL Server Name Convention and T-SQL Programming Style
There are only two hard things in Computer Science: cache invalidation and naming things -- Phil Karlton The recommendations in this article are not the ultimate truth. Please consider this article as a rule template that you can adapt to your needs. A naming convention is a set of rules for choosing the character sequence to […]
2019-12-10
25,161 reads
Function and Queries to Convert Hierarchical Adjacency to Nested Json Arrays
This script converts hierarchical adjacency into nested json rows which contain the recursive "downlines" of each node. The table-valued function treats each row in the original adjacency as the root node in a recursive common table expression.
2019-11-25 (first published: 2019-11-24)
792 reads
Function and Queries to Convert Hierarchical Adjacency to Nested Json Arrays
This script converts hierarchical adjacency into nested json rows which contain the recursive "downlines" of each node. The table-valued function treats each row in the original adjacency as the root node in a recursive common table expression.
2019-11-12 (first published: 2019-11-08)
2,069 reads
T-SQL query to copy data from one database to another database
T-SQL query to copy the rows of all the tables from one database to another database only if they have rows in Source DB and exact same Schema in both Source and Destination DB.
2019-11-07 (first published: 2019-10-30)
5,498 reads
T-SQL query to get the latest available backup chain
T-SQL query to return the latest available database backup chain (Full, Differential and Log) of individual databases along with their backup size and compressed size.
2019-11-08 (first published: 2019-10-30)
3,820 reads
Blogs
TempDB Internals – What’s New (SQL Server 2016 to 2022)
By Vinay Thakur
I wrote about TempDB Internals and understand that Tempdb plays very important role on...
AI: Blog a Day – Day 2: Generative AI, Multimodal Systems, and Agent AI
By Vinay Thakur
continuing from Day 1 where we covered the history of AI and GPT family,...
A Wellbeing Day at Redgate
By Steve Jones
It’s a day off for Redgate today. This is our annual wellbeing day, where...
Forums
A Quick Restore
Comments posted to this topic are about the item A Quick Restore
Guarding Against SQL Injection at the Database Layer (SQL Server)
Comments posted to this topic are about the item Guarding Against SQL Injection at...
Ola Hallengren Index Optimize Maintenance can we have data compression = page
I have a quick question on Ola Hallengren Index Optimize Maintenance . Do we...
Question of the Day
A Quick Restore
While doing some testing of an application, I wanted to reset my environment after doing some testing with this code:
USE DNRTest BACKUP DATABASE DNRTest TO DISK = 'dnrtest.bak' GO /* Bunch of stuff tested here */RESTORE DATABASE DNRTest FROM DISK = 'dnrtest.bak' WITH REPLACEWhat happens if this runs, assuming the "bunch of stuff" isn't anything affecting the instance. See possible answers