Check out example codes for "docker mssql". It will help you in understanding the concepts better.

Code Example 1

# Run container
docker run -e 'ACCEPT_EULA=Y' -e 'SA_PASSWORD=yourStrong(!)Password' -p 1433:1433 -d mcr.microsoft.com/mssql/server:2017-latest

# Connect to container
docker exec -it [id] /opt/mssql-tools/bin/sqlcmd -S localhost -U SA -P "<[email protected]>"

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