i'm trying to do some practices on command line..

as you see in the pic the command is not triggering. i'm pressing Enter. (as described in practicing book)
End a command with a semicolon ;
CREATE DATABASE deneme;
As long as it keeps printing the -> prompt on new lines, it is expecting the ; terminator.
Use ; as stated.
This is a good example of why it is good practice to always end your SQL statements with a semicolon. It's a good habit to get into.
; but it is an excellent habit.