Microsoft SQL Server remains one of the most widely used enterprise databases — powering finance systems, ERP platforms, and large-scale web applications. ER Flow is a SQL Server ERD tool that gives your team a modern, visual workspace for designing and documenting T-SQL schemas without the complexity of legacy database tools.
Model SQL Server tables with proper T-SQL column types: NVARCHAR, DATETIME2, UNIQUEIDENTIFIER, DECIMAL, BIT, VARBINARY, and XML. Define primary keys, configure IDENTITY columns, set NOT NULL constraints, and draw foreign key relationships. ER Flow renders your full SQL Server schema as an interactive ER diagram that the whole team can navigate.
ER Flow integrates with your AI coding assistant via MCP Server, letting you scaffold SQL Server schemas from natural language descriptions. Combined with CRDT real-time collaboration and checkpoint-based migration generation, ER Flow modernizes SQL Server schema design for teams that want speed and precision without sacrificing rigor.
Design SQL Server tables with NVARCHAR, INT, BIGINT, DATETIME2, UNIQUEIDENTIFIER, DECIMAL, BIT, and more. ER Flow generates syntactically correct T-SQL DDL.
Connect MCP-compatible AI tools to ER Flow and describe your SQL Server schema requirements. The AI creates tables, indexes, and foreign keys while you review on the visual canvas.
Multiple architects and developers design the SQL Server schema simultaneously with CRDT-powered sync. No email attachments, no .erwin files, no merge conflicts.
Save checkpoints of your SQL Server schema at each design milestone. Generate precise ALTER TABLE migration scripts to evolve production databases safely.
Generate a script from SQL Server Management Studio and paste it into ER Flow. The visual diagram of your entire schema is ready in seconds.
Add new tables, define T-SQL column types, configure IDENTITY primary keys, and draw foreign key relationships between tables.
Share the diagram link with your DBA, architect, and development team. Review the schema design together in real-time before touching production.
Save a checkpoint and iterate. Generate a diff migration script and apply it to your SQL Server database using your deployment pipeline.
Free to get started. No credit card required.