So you're switching to PostgreSQL from MySQL? Here is some help...
General hints on PostgreSQL
- 
\?opens the command overview
- 
\dlists things:\dulists users,\dtlists tables etc
Command comparison
| Description | MySQL command | PostgreSQL equivalent | 
|---|---|---|
| Connect to the database | mysql -u $USERNAME -p | sudo -u postgres psql | 
| Show databases | SHOW DATABASES; | \l[ist] | 
| Use/Connect to a database named 'some_database' | USE some_database; | \c some_database | 
| Show tables/relations within one database | SHOW TABLES; | \dt | 
| Show table details (columns, types) | DESCRIBE some_table; | \d+ some_table | 
| Show indices of some_table (in case of MySQL) and all indices of database (PostgreSQL) | SHOW INDEX FROM some_table; | \di | 
| Create user that can create databases | CREATE USER harry IDENTIFIED BY 'foo'; | CREATE ROLE username WITH createdb LOGIN [PASSWORD 'password']; | 
| Change password of an existing user | ... | ALTER ROLE username WITH PASSWORD 'password'; | 
| Grants access to a database. | GRANT ALL PRIVILEGES ON database.* TO username@localhost; | GRANT ALL PRIVILEGES ON DATABASE database TO username; | 
| Grants access to create databases. | ? | ALTER USER username CREATEDB; | 
| Expanded table formatting mode (pretty print) | YOUR QUERY\G; | \x on | 
Further reading
- How to setup Ruby on Rails with PostgreSQL Show archive.org snapshot
- Connect to a Rails database with bin/rails dbconsole -p.
Posted by Thomas Eisenbarth to makandra dev (2013-09-26 15:35)