SQL Server
Microsoft's relational database management system, widely used for enterprise data storage and management. Beginning with the 2005 version, it introduced Dynamic Management Views (DMVs) and Dynamic Management Functions (DMFs) as system-level diagnostic interfaces.
Core Facts
Timeline (last 90 days)
The lead blocker refers to the session at the very top of the blocking chain that actually holds the lock resource and causes subsequent sessions to queue and wait.
The Intelligent Cloud segment mainly includes the Azure public cloud, server products (such as Windows Server and SQL Server), enterprise services and GitHub, among others.
Choosing the Always up-to-date update policy provides the fastest access to new engine features on the Azure side, but the database format may diverge, thereby losing the exit path of backup/restore and physical replication back to SQL Server (data copy mechanisms such as export/import and transactional replication remain available).
Managed Instance Link (MI Link) is implemented based on the distributed availability group mechanism, establishing a continuous data synchronization link between the source SQL Server and the target Azure SQL Managed Instance.
SQL Database in Fabric's underlying engine is consistent with SQL Server and Azure SQL, so developers can continue using familiar tools such as VS Code and SSMS.
Fabric Database Hub supports unified management of multiple database engines such as SQL Server, PostgreSQL, and Cosmos.
The ranking gap between PostgreSQL and the third-place SQL Server is continuously narrowing.
The learned cardinality estimation introduced by Microsoft in SQL Server replaces histograms with a neural network to provide more accurate row count predictions, improving the quality of cost model inputs rather than replacing the entire optimization pipeline.
Stored procedures were first widely used in Oracle and SQL Server, and were originally designed to reduce network round trips between the application layer and the database.
Stored procedures can be traced back to the design of Sybase database in the 1980s, and were later inherited and developed by Microsoft SQL Server.
1 more timeline events
All Facts (12)
Azure SQL Database, SQL Managed Instance, and on-premises SQL Server 2022+ share the same core query engine (SQL OS + Query Processor).
65%UnverifiedPostgreSQL使用libpq协议，MySQL使用MySQL Protocol，SQL Server使用TDS（Tabular Data Stream）协议
90%UnverifiedMySQL uses AUTO_INCREMENT to implement auto-increment primary keys, PostgreSQL uses SERIAL or IDENTITY, and SQLite automatically implements auto-increment via INTEGER PRIMARY KEY.
70%UnverifiedSQL Database in Fabric's underlying engine is consistent with SQL Server and Azure SQL, so developers can continue using familiar tools such as VS Code and SSMS.
60%UnverifiedThe lead blocker refers to the session at the very top of the blocking chain that actually holds the lock resource and causes subsequent sessions to queue and wait.
50%UnverifiedThe Intelligent Cloud segment mainly includes the Azure public cloud, server products (such as Windows Server and SQL Server), enterprise services and GitHub, among others.
50%UnverifiedManaged Instance Link (MI Link) is implemented based on the distributed availability group mechanism, establishing a continuous data synchronization link between the source SQL Server and the target Azure SQL Managed Instance.
50%UnverifiedChoosing the Always up-to-date update policy provides the fastest access to new engine features on the Azure side, but the database format may diverge, thereby losing the exit path of backup/restore and physical replication back to SQL Server (data copy mechanisms such as export/import and transactional replication remain available).
50%UnverifiedFabric Database Hub supports unified management of multiple database engines such as SQL Server, PostgreSQL, and Cosmos.
50%UnverifiedThe learned cardinality estimation introduced by Microsoft in SQL Server replaces histograms with a neural network to provide more accurate row count predictions, improving the quality of cost model inputs rather than replacing the entire optimization pipeline.
50%UnverifiedStored procedures were first widely used in Oracle and SQL Server, and were originally designed to reduce network round trips between the application layer and the database.
50%UnverifiedStored procedures can be traced back to the design of Sybase database in the 1980s, and were later inherited and developed by Microsoft SQL Server.
50%