I. SQL Commands
This is reference information for the SQL
commands supported by Postgres.
- Table of Contents
- ABORT — Aborts the current transaction
- ALTER GROUP — Add users to a group, remove users from a group
- ALTER TABLE — Modifies table properties
- ALTER USER — Modifies user account information
- BEGIN — Begins a transaction in chained mode
- CHECKPOINT — Force transaction log checkpoint
- CLOSE — Close a cursor
- CLUSTER — Gives storage clustering advice to the server
- COMMENT — Add comment to an object
- COMMIT — Commits the current transaction
- COPY — Copies data between files and tables
- CREATE AGGREGATE — Defines a new aggregate function
- CREATE CONSTRAINT TRIGGER — Create a trigger to support a constraint
- CREATE DATABASE — Creates a new database
- CREATE FUNCTION — Defines a new function
- CREATE GROUP — Creates a new group
- CREATE INDEX — Constructs a secondary index
- CREATE LANGUAGE — Defines a new language for functions
- CREATE OPERATOR — Defines a new user operator
- CREATE RULE — Defines a new rule
- CREATE SEQUENCE — Creates a new sequence number generator
- CREATE TABLE — Creates a new table
- CREATE TABLE AS — Creates a new table from the results of a SELECT
- CREATE TRIGGER — Creates a new trigger
- CREATE TYPE — Defines a new base data type
- CREATE USER — Creates a new database user
- CREATE VIEW — Constructs a virtual table
- DECLARE — Defines a cursor for table access
- DELETE — Removes rows from a table
- DROP AGGREGATE — Removes the definition of an aggregate function
- DROP DATABASE — Removes an existing database
- DROP FUNCTION — Removes a user-defined C function
- DROP GROUP — Removes a group
- DROP INDEX — Removes existing indexes from a database
- DROP LANGUAGE — Removes a user-defined procedural language
- DROP OPERATOR — Removes an operator from the database
- DROP RULE — Removes existing rules from the database
- DROP SEQUENCE — Removes existing sequences from a database
- DROP TABLE — Removes existing tables from a database
- DROP TRIGGER — Removes the definition of a trigger
- DROP TYPE — Removes user-defined types from the system catalogs
- DROP USER — Removes a user
- DROP VIEW — Removes existing views from a database
- END — Commits the current transaction
- EXPLAIN — Shows statement execution plan
- FETCH — Gets rows using a cursor
- GRANT — Grants access privilege to a user, a group or all users
- INSERT — Inserts new rows into a table
- LISTEN — Listen for a response on a notify condition
- LOAD — Dynamically loads an object file
- LOCK — Explicitly lock a table inside a transaction
- MOVE — Moves cursor position
- NOTIFY — Signals all frontends and backends listening on a notify condition
- REINDEX — Recover corrupted system indexes under stand-alone Postgres
- RESET — Restores run-time parameters to default values
- REVOKE — Revokes access privilege from a user, a group or all users.
- ROLLBACK — Aborts the current transaction
- SELECT — Retrieves rows from a table or view
- SELECT INTO — Creates a new table from the results of a SELECT
- SET — Set run-time parameters
- SET CONSTRAINTS — Set the constraint mode of the current SQL-transaction
- SET TRANSACTION — Set the characteristics of the current SQL-transaction
- SHOW — Shows run-time parameters
- TRUNCATE — Empty a table
- UNLISTEN — Stop listening for notification
- UPDATE — Replaces values of columns in a table
- VACUUM — Clean and analyze a Postgres database