sqlt-diagram - Automatically create a diagram from a database schema
./sqlt-diagram -d|-f|--from|--db=db_parser [options] schema.sql Options: -o|--output Output file name (default STDOUT) -i|--image Output image type ("png" or "jpeg," default "png") -t|--title Title to give schema -c|--cols Number of columns -n|--no-lines Don't draw lines --font-size Font size ("small," "medium," "large," or "huge," default "medium") --gutter Gutter size between tables --color Add colors --show-fk-only Only show fields that act as primary or foreign keys --natural-join Perform natural joins --natural-join-pk Perform natural joins from primary keys only -s|--skip Fields to skip in natural joins --debug Print debugging information
This script will create a picture of your schema. Only the database driver argument (for SQL::Translator) is required. If no output file name is given, then image will be printed to STDOUT, so you should redirect the output into a file.
The default action is to assume the presence of foreign key relationships defined via "REFERENCES" or "FOREIGN KEY" constraints on the tables. If you are parsing the schema of a file that does not have these, you will find the natural join options helpful. With natural joins, like-named fields will be considered foreign keys. This can prove too permissive, however, as you probably don't want a field called "name" to be considered a foreign key, so you could include it in the "skip" option, and all fields called "name" will be excluded from natural joins. A more efficient method, however, might be to simply deduce the foriegn keys from primary keys to other fields named the same in other tables. Use the "natural-join-pk" option to achieve this.
Ken Y. Clark <email@example.com>.