Oracle SQL - Free/Dummy Databases for Query Practice?

[kamakoda]

Hey all,

I'm a little rusty on my Oracle SQL skills and want to brush up. Does anyone have any cool resources for dummy databases for practicing?

The more the better!

[jak_ub]

I think it existed somewhat forever, You can install some examples with Oracle SQL 12c

https://docs.oracle.com/database/121/COMSC/overview.htm#COMSC005

[Dynamic_Gravity]

Northwind database