= SQL (PostgreSQL)
<code sql>SELECT version();</sql>
<code sql>select * from «pg_user»;</code>
<code sql>CREATE USER nombre_usuario WITH password ‘123456';</code>
<code sql>DROP USER nombre_usuario;</code>
<code sql>ALTER USER usertochange WITH password ‘new_passwd’;</code>
<code sql>ALTER USER mysuper WITH SUPERUSER;
ALTER USER mysuper WITH SUPERUSER CREATEDB CREATEROLE INHERIT LOGIN REPLICATION;</code>
<code sql>CREATE DATABASE nombre_db WITH OWNER nombre_usuario;</code>
<code sql>DROP DATABASE nombre_db;</code>
<code sql>ALTER DATABASE database_name OWNER TO new_owner;</code>
<code sql>SELECT pg_size_pretty(pg_database_size(‘dbname’));</code>
<code sql>TRUNCATE TABLE table RESTART IDENTITY;</code>
<code sql>COPY (SELECT * FROM tablename) TO '/home/tablename.csv' WITH DELIMITER '|';</code>
  * LIMIT : número de registros a mostrar
  * OFFSET : a partir de dónde se empezaran a mostrar los registros

/via: [[https://medium.com/erdk2/comandos-consola-postgres-54591bdeec0a]]\\
/via: [[http://viviryaprenderweb.com/postgres-comandos-basicos-segunda-lista/]]