hsqldb-utils software package provides Java SQL database engine (utilities), you can install in your Debian 9 (Stretch) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install hsqldb-utils
hsqldb-utils is installed in your system.
Make ensure the hsqldb-utils package were installed using the commands given below,
$ sudo dpkg-query -l | grep hsqldb-utils *
You will get with hsqldb-utils package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | Databases |
| Package | hsqldb-utils |
| Version | 2.3.4-1 |
| Description | Java SQL database engine (utilities) |
| Sub Section | Database |