详细语法解释见
www.linuxforum.net/books/postgresNEW/sql-commands.htm
ABORT
ALTER GROUP
ALTER TABLE
ALTER USER
BEGIN
CLOSE
CLUSTER
COMMIT
COPY
CREATE AGGREGATE
CREATE DATABASE
CREATE FUNCTION
CREATE GROUP
CREATE INDEX
CREATE LANGUAGE
CREATE OPERATOR
CREATE RULE
CREATE SEQUENCE
CREATE TABLE
CREATE TABLE AS
CREATE TRIGGER
CREATE TYPE
CREATE USER
CREATE VIEW
DECLARE
DELETE
DROP AGGREGATE
DROP DATABASE
DROP FUNCTION
DROP GROUP
DROP INDEX
DROP LANGUAGE
DROP OPERATOR
DROP RULE
DROP SEQUENCE
DROP TABLE
DROP TRIGGER
DROP TYPE
DROP USER
DROP VIEW
END
EXPLAIN
FETCH
GRANT
INSERT
LISTEN
LOAD
LOCK
MOVE
NOTIFY
RESET
REVOKE
ROLLBACK
SELECT
SELECT INTO
SET
SHOW
TRUNCATE
UNLISTEN
UPDATE
VACUUM