You may also decide whether foreign-key names, column ordinal numbers, and schema names should be displayed by setting the following properties in the SchemaCrawler configuration file,. Notice also that you can choose different file formats like /_schemacrawler/lib/*.jar | tr ' ' ':') schemacrawler.Main -server=mysql -database=your_database_in_localhost -user=your_user -password=your_password -infolevel=maximum -command=graph -outputformat=pdf -outputfile=my_database_diagram.pdf $* DBeaver allows you to view the diagrams of existing tables and whole database schemas, see Database Structure Diagrams. Just download SchemaCrawler, place it somewhere in your java path and run it as follows: java -classpath $(echo. ER diagrams appear on the rightmost tab of the Database Object Editor: Entity Relation Diagrams (ERD) are graphic presentations of database entities and the relations between them. you can discover relationships between tables that are not expressed as foreign keys, using the "weak associations" feature.you can use regular expressions to limit the tables and columns in the diagram, making it really useful when exploring an unfamiliar database. ![]() SchemaCrawler automatically generates diagrams from databases, using GraphViz. The database is not one I'm very familiar with, so I'm looking to learn from looking at the diagram rather than dumping what I know into a diagram (which seems to be what most diagramming tools are designed for). I don't exactly have the funding to make the above, but I do have some funding to buy a tool like that if it's good.Įdit: I should mention that I'm trying to diagram a database with 100+ tables, so I'd like to automate as much of it as possible. I'd also try to deduce which tables are lookup tables, which ones are mana-to-many intermediate tables, etc and lay out the entities such that these roles are obvious to a person looking at the diagram. Is there any tool out there that will reverse engineer the structure of an existing database, and then automatically lay it out in a way which is easy to understand and reveals the organization of the database? If I were to make such a tool, I'd have it minimize the length of lines connecting entities, minimize the number of lines which cross each other, and make groups of related entities stand out from each other. Some make an attempt at organizing the entities, but they don't do a very good job of it. Most of them just plop all the entities down on top of each other and call it a day. I've seen a lot of tools which can reverse engineer an ERD from an existing database, but I haven't been able to find one which is capable of automatically laying out the diagram in a reasonable way.
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