' sqlsingle' allows you to send SQL messages to a PostgreSQL database from Pd and retrieve the results. In order to use the 'sqlsingle' external you will need to install PostgreSQL available from http://www.postgresql.org. There's a bit of work to do compiling the source, setting up environment variables, permissions etc - but the package comes with good documentation. Read the installation guide and do the introductory tutorial before trying 'sqlsingle'.

Please download sqlsingle for full readme file.