To install Oracle Database, create the new Oracle home, extract the image file into the newly-created Oracle home, and run the setup wizard to register the Oracle Database product.
Note: You must extract the image software (db_home.zip) into the directory where you want your Oracle Database home to be located, and then run the Oracle Database Setup Wizard to start the Oracle Database installation and configuration. Oracle recommends that the Oracle home directory path you create is in compliance with the Oracle Optimal Flexible Architecture recommendations.
Directions Installation guides and general Oracle Database 19c documentation are here.
>>no more command mode at all ? I don't understand what you mean by this.
And both client + server packages for MariaDB/MySQL involve many files, so likely your mysql client will also require many libraries.
The only way to install MariaDB/MySQL/Oracle/Postg
If you try installing a single executable, for this to work, you must build the product from source as a standalone binary, so with --disable-shared passed at every build step.
Since Oracle isn't available as source, you can certainly accomplish this... if you have unlimited time + budget... by running lld on the exact binary file, then do a copy on every referenced .so in the load map. Also your client/server will most likely still crash, so for first few crashes, you'll record the crash message, which will contain the dynamically loaded .so files, then copy these over too.
Likely you can come close to a working system in a few hours to a few days.
Be sure to collect all these .so files in one place so you can use LD variable hacks like LD_LIBRARY_PATH setting (or however your Distro does this) so you can point your binary to all the .so files you downloaded.
Note: You'll have to go through this same process every time you update the binary too.