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Visual schema/E-R design: the ability to draw entity-relationship diagrams for the database. If missing, the following two features will also be missing; Reverse engineering - the ability to produce an ER diagram from a database, complete with foreign key relationships
An entity–relationship model (or ER model) describes interrelated things of interest in a specific domain of knowledge. A basic ER model is composed of entity types (which classify the things of interest) and specifies relationships that can exist between entities (instances of those entity types).
Logical and physical modelling - Build complex logical and physical entity relationship models and reverse, forward, and engineer databases. Reporting - Generate detailed reports on existing database structures. Model customization - Add logical data to user diagrams to customize user models. All Toad products typically have 2 releases per year.
ER/Studio Repository and Team Server (formerly Portal/CONNECT) for web based publishing collaboration and model management, with Business Glossary as standard. MagicDraw Conceptual, Logical & Physical + MDA Transform of Logical to Physical
A sample entity–relationship diagram. One of the most common types of conceptual schemas is the ER (entity–relationship model) diagrams. Attributes in ER diagrams are usually modeled as an oval with the name of the attribute, linked to the entity or relationship that contains the attribute.
August 2006 - PowerDesigner 12.1 released with enhanced support for Microsoft Visual Studio and SQL Server July 2007 - PowerDesigner 12.5 released with new ETL ( Extract, transform, load ) and EII ( Enterprise Information Integration ) modeling and full UML 2.0 diagrams support
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Visual representation often may also be exported as a production-ready source code made in DB-compatible languages like SQL. The database schema is the structure of a database described in a formal language supported typically by a relational database management system (RDBMS).