connect to postgres database command line mac code example

Example 1: how to open postgresql in mac

brew services start postgresqlpsql postgres

Example 2: can't connect to postgresql mac os

rm -f /usr/local/var/postgres/postmaster.pid

brew services restart postgresql

Example 3: how to open postgresql in mac

/usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"