A Common Table Expression (CTE) in SQL Server, defined using the WITH clause, is a temporary result set that simplifies complex queries by improving readability and maintainability. CTEs support recursive queries, enabling efficient handling of hierarchi
Using a Common Table Expression also makes it easier to handle a scenario from a scalar subselect. A scalar subselect is a subquery that returns a single value for each row in the main query. For example, we want to categorize students based on their age at the time of enrollment. Whereas...
I’ll explain this by using examples in DDL, using SQL Server syntax. The short version of this is fairly simple. Every table that you want to use in relations should have a primary key constraint; this can either be a single field or a combination of fields defined by an expression. ...
Virtual log file growth In previous versions of SQL Server, if the next growth is more than 1/8 of the current log size, and the growth is less than 64 MB, four VLFs were created. In SQL Server 2022 (16.x), this behavior is slightly different. Only one VLF is created if the grow...
single column. Each value in the column represents a reusable calculation, or calculation item, that can be applied to any of the measures. A calculation group can have any number of calculation items. Each calculation item is defined by a DAX expression. To learn more, seeCalculation groups....
November 2024 Mirroring for Azure SQL Database GA With Azure SQL Database mirroring in Fabric, you can easily replicate data from Azure SQL Database into OneLake in Microsoft Fabric. November 2024 Real-Time hub Real-Time hub is now generally available. For more information, see Introduction to...
Azure SQL Managed Instance support You can now host a database catalog used for SSRS in an Azure SQL Managed Instance (MI) either on a virtual machine (VM) or in your data center. Support is limited to database credentials for the connection to SQL MI. ...
What's new inIBM Informixversion 14.10.xC1 Performance J-foundation upgrade Log Replay New Enterprise Replication command to automate setting up replication between Informix servers Common Table Expression Administration InformixHQ REGEX: rtrim flag and overloaded functions ...
The two most common types of blind SQL injection attacks are theBoolean Attackand theTime-based Attack. In a Boolean attack, the attacker expects a different response if the query isTruethan if it isFalse. For example, the results might get updated if the query is valid, but stay the sam...
Blockchain: Blockchain is an emerging technology for digital ledgers that can record and validate transactions using fast, nonrepudiatable, programmable smart contracts.Blockchain for supply chainshas a variety of benefits, for example. Internet of Things: Connected sensors are everywhere, in medical ...