Docker MySQL no output - mysql

Question

Docker for Windows
I have a machine set up with 2 containers. They are both running the standard mysql image. One is set up to be the server, and I am linking to it from the other and attempting to run mysql commands.
Ideally, I would like to be able to do this all through the command prompt so I can call it through Python.
I was able to run a few commands error-free and attempted to place my name into the Username table of myDB.
When I run the command:
docker exec sqlserverClient mysql -uroot -ppassword -e"use myDB" -e"select * from Usernames"
I get back the output:
Warning: Using a password on the command line interface can be insecure
And nothing else.
Where is my table? Even if the insert went wrong, shouldn't I at least see a blank table?
I expected to see something like this:
+------------+-------------+
| firstname | lastname |
+------------+-------------+
| First | Last |
+------------+-------------+
"docker logs sqlserverClient" doesn't have it. So where did it go?

Answer 1

Try with docker exec -it, to have tty and the output
But remember docker exec is for debug only.
The best practice is to have a docker container with:
an entrypoint set to sqlserverClient
a cmd that you pass in parameter when running a transient container.
That is:
docker run --rm -it sqlimage mysql -uroot -ppassword -e"use myDB" -e"select * from Usernames"
Once the command is executed, the container stopped and is rmeoved.
That means you can have an alias like:
alias drs='docker run --rm -it sqlimage'
And call:
drs mysql -uroot -ppassword -e"use myDB" -e"select * from Usernames"