Docker Image to run sql query

Question

I need to create dockerfile to create container to be able to run queries on my db from jenkins pipeline(do not wanna use jenkins plugin or db driver on slaves)

pipeline {
    agent {
        dockerfile { 'my_docker_file' }
    }
    stages {
        stage('Test') {
            steps {
                sh'''#!/bin/bash
                     USER='username'
                     PASS='password'
                     PORT=3160
                     HOST='hostname'
                     DBASE='mysqlDbName'

                     Query='SELECT * FROM table WHERE some=other LIMIT 10'

                     mysql -u$USER -p$PASS -P$PORT -h$HOST -D$DBASE <<EOF 
                     $Query
                     EOF
                '''
            }
        }
    }
}

Do not bother too much about the shell script, it is just for illustration

So how should this dockerfile looks like to achieved this? I tried(cannot use images outside company):

FROM our_nexus_url/ubuntu

RUN apt-get update -qq && apt-get install -y mysql-client

... or second option is to run the query inside the container and only return result to jenkins