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.
Timeline (last 90 days)
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.
MySQL uses AUTO_INCREMENT to implement auto-increment primary keys, PostgreSQL uses SERIAL or IDENTITY, and SQLite automatically implements auto-increment via INTEGER PRIMARY KEY.
All Facts (6)
PostgreSQL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%UnverifiedThe ranking gap between PostgreSQL and the third-place SQL Server is continuously narrowing.
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%