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http://www.diaryofaninja.com/blog/2009/09/25/running-large-mssql-scripts-amp–resulting-memory-errors
It took time to get it to work, I went through the same headaches, but finally got it running with below command, including a login.
https://docs.microsoft.com/en-us/sql/tools/sqlcmd-utility
sqlcmd -S YOURSQLSERVER\INSTANCENAME -i "C:\Your Script.sql" sqlcmd -a packet_size -A (dedicated administrator connection) -b (terminate batch job if there is an error) -c batch_terminator -C (trust the server certificate) -d db_name -e (echo input) -E (use trusted connection) -f codepage | i:codepage[,o:codepage] | o:codepage[,i:codepage] -g (enable column encryption) -G (use Azure Active Directory for authentication) -h rows_per_header -H workstation_name -i input_file -I (enable quoted identifiers) -j (Print raw error messages) -k[1 | 2] (remove or replace control characters) -K application_intent -l login_timeout -L (list servers, optional clean output) -m error_level -M multisubnet_failover -N (encrypt connection) -o output_file -p[1] (print statistics, optional colon format) -P password -q "cmdline query" -Q "cmdline query" (and exit) -r[0 | 1] (msgs to stderr) -R (use client regional settings) -s col_separator -S [protocol:]server[instance_name][,port] -t query_timeout -u (unicode output file) -U login_id -v var = "value" -V error_severity_level -w column_width -W (remove trailing spaces) -x (disable variable substitution) -X[1] (disable commands, startup script, environment variables, optional exit) -y variable_length_type_display_width -Y fixed_length_type_display_width -z new_password -Z new_password (and exit) -? (usage)