postgress image
psql -h localhost -d postgres
CREATE TABLE basic (
mykey varchar (50) NOT NULL PRIMARY KEY,
name varchar (25) NOT NULL
);
\d
\q
cat a.csv
1,a
2,b
3,c
4,a
5,a
6,a
psql -h localhost -c "\copy basic FROM './a.csv' delimiter ',' csv"
psql -h localhost -c "select * from basic"
psql -h localhost -c "select distinct(name) from basic"