Are there any free tools to generate tables diagrams with Postgresql?
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postgresql
diagram
I love schemaspy for schema visualisations. Look at the sample output they provide, and drool. Note the tabs!
You'll need to download the JDBC driver here, then your command should look something like:
java -jar schemaspy-6.0.0-rc2.jar -t pgsql -db database_name -host myhost -u username -p password -o ./schemaspy -dp postgresql-9.3-1100.jdbc3.jar -s public -noads
Sometimes using options -port will not working if your database has diferrent port, so you have to add manual port after host parameter, for example:
java -jar schemaspy-6.0.0-rc2.jar -t pgsql -db database_name -host myhost:myport -u username -p password -o ./schemaspy -dp postgresql-9.3-1100.jdbc3.jar -s public -noads
You'll need to install graphviz as well if you want graphics (apt-get install graphviz for debian based distros).
SchemaCrawler for PostgreSQL can generate database diagrams from the command line, with the help of GraphViz. You can use regular expressions to include and exclude tables and columns. It can also infer relationships between tables using common naming conventions, if not foreign keys are defined.
Just found http://www.sqlpower.ca/page/architect through the Postgres Community Guide mentioned by Frank Heikens. It can easily generate a diagram, and then lets you adjust the connectors!
Inside Eclipse I've used the Clay plugin (ex Clay-Azurri). The free version allows to introspect ("reverse engineer") an existing DB schema (via JDBC) and make a diagram of some selected tables.
PostgreSQL Autodoc has worked well for me. It is a simple command line tool. From the web page:
This is a utility which will run through PostgreSQL system tables and returns HTML, Dot, Dia and DocBook XML which describes the database.
Quick solution I found was inside the pgAdmin program for windows. Under Tools menu there is a "Query Tool". Inside the Query Tool there is a Graphical Query Builder that can quickly show the database tables details. Good for a basic view
Source: Stackoverflow.com