Julia - Language - Connect to Postgres DB - select statement

Below is the connection script, we can use to retrieve data from a PostGres Database using Julia Language:

$ julia
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|__/                   |  x86_64-pc-linux-gnu

julia> 

using NamedTuples;
using DataStreams;
using LibPQ;

v_postgres_host = "my.postgresServer.us-west-1.rds.amazonaws.com"; # Input the hostname here
v_postgres_dbname = "myPostGresDB"; # input the db name here 
v_postgres_user = "mahesh";   # input the postgres user
v_postgres_password = "myPass";  # input the password for the postgres user here 
v_port ="5432"; # input the port number of postgres db here
#create the connection here 
conn_string = "host=" *v_postgres_host *" port=" *v_port *" dbname=" *v_postgres_dbname *" user=" *v_postgres_user *" password=" *v_postgres_password *"";
conn = LibPQ.Connection(conn_string);
data = fetch!(NamedTuple, execute(conn, "SELECT department_id FROM school_table WHERE subject_name = \$1", ["physics"]));
close(conn);


To retrieve information from the data variable use the following:
data[:department_id]