2022-01-17
612 reads
T-SQL
Quantifier predicates
Predicates in SQL are often complex and difficult to understand. In this article, Joe Celko explains the logic behind a few of the predicates: EXISTS, SOME, ANY and ALL.
2022-01-14
How to Create a FOR Loop in SQL Server
Learn different ways to create FOR Loops using T-SQL such as using WHILE loops, cursors, tally tables and more.
2021-12-31
2021-12-29
558 reads
SQL Server instance startup type check by SQL script
I have developed the script to check SQL Server instances startup type, sometimes we didn't know all our SQL instances startup type correctly configurated, especially we cannot distinguish the Automatic and Automatic(Delayed Start) from the direct query, the only way is querying from the registry, you can use this script in your environment to bulk […]
2021-12-24
1,553 reads
BETWEEN the two of us
BETWEEN can be used in a SQL WHERE clause to filter on a range. Joe Celko explains the history of BETWEEN and also could be implemented.
2021-12-15
2021-12-08
639 reads
Get backup folder sizes from shared Location
Got a message from the Operation team as below Hi Harsha, I'm seeing a larger than normal rate of change for a week day on the backups for the SQL2000 servers. Did anything run differently yesterday compared to Monday? I have 22 sql servers and all the Weekend and Monthly backups goes to the location […]
2021-12-03
587 reads
Trusting STRING_SPLIT() order in Azure SQL Database
Learn about the changes to the STRING_SPLIT function in Azure SQL Database that allows you to specify ordinal position of the output.
2021-12-03
SQL Server Data Masking: a comparison with Gallium Data
Introduction In SQL Server 2016, Microsoft introduced a new feature called dynamic data masking, which allows you to mask the values of certain columns and keep that data hidden from certain users, without having to modify your applications. Let's take a look at how SQL Server does data masking, and compare it to the way Gallium Data […]
2021-12-03
1,966 reads
Blogs
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T-SQL Tuesday #197 Invitation – An impactful session or two from a conference
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Forums
The day-to-day pressures of a DBA team, and how we can work smarter with automation and AI
Comments posted to this topic are about the item The day-to-day pressures of a...
Daily aggregation of Azure Blob Storage by tier (created/tier-change/deleted)
Hello all, I’m looking for advice on how to derive a daily snapshot table...
SQL 2017 to SQL 2025. Good to Go ?
We need to replace our Windows server running SQL 2017. Any reason not to...
Question of the Day
Using OPENJSON
I have some data in a table that looks like this:
BeerID BeerName brewer beerdescription 1 Becks Interbrew Beck's is a German-style pilsner beer 2 Fat Tire New Belgium Toasty malt, gentle sweetness, flash of fresh hop bitterness. 3 Mac n Jacks Mac & Jack's Brewery This beer erupts with a floral, hoppy taste 4 Alaskan Amber Alaskan Brewing Alaskan Brewing Amber Ale is an "alt" style beer 8 Kirin Kirin Brewing Kirin Ichiban is a Lager-type beerIf I run this, what is returned?
select t1.[key]
from openjson((select t.* FROM Beer AS t for json path)) t1 See possible answers