SQL语法 ALTER AGGREGATE ALTER DATABASE ALTER DEFAULT PRIVILEGES ALTER EVENT TRIGGER ALTER FOREIGN DATA WRAPPER ALTER FUNCTION ALTER INDEX ALTER LARGE OBJECT ALTER MATERIALIZED VIEW ALTER PACKAGE ALTER RESOURCE LABEL ALTER ROLE ALTER SCHEMA ALTER SERVER ALTER SUBSCRIPTION ALTER SYSTEM KILL SESSION ALTER TABLE ALTER TABLE SUBPARTITION ALTER TEXT SEARCH CONFIGURATION ALTER TRIGGER ALTER USER ALTER VIEW BEGIN CHECKPOINT CLOSE COMMENT COMMIT PREPARED CREATE AGGREGATE CREATE CAST CREATE COLUMN ENCRYPTION KEY CREATE DATA SOURCE CREATE EVENT TRIGGER CREATE FOREIGN TABLE CREATE GROUP CREATE INDEX CREATE MASKING POLICY CREATE MODEL CREATE PACKAGE CREATE PUBLICATION CREATE RESOURCE POOL CREATE ROW LEVEL SECURITY POLICY CREATE SCHEMA CREATE SERVER CREATE SYNONYM CREATE TABLE AS CREATE TABLESPACE CREATE TEXT SEARCH DICTIONARY CREATE TYPE CREATE USER MAPPING CREATE WEAK PASSWORD DICTIONARY DEALLOCATE DELETE DROP AGGREGATE DROP CAST DROP COLUMN ENCRYPTION KEY DROP DATA SOURCE DROP EVENT TRIGGER DROP FOREIGN DATA WRAPPER DROP FUNCTION DROP INDEX DROP MASKING POLICY DROP MODEL DROP OWNED DROP RESOURCE LABEL DROP ROLE DROP RULE DROP SEQUENCE DROP SUBSCRIPTION DROP TABLE DROP TEXT SEARCH CONFIGURATION DROP TRIGGER DROP USER DROP VIEW EXECUTE EXPLAIN PLAN GRANT LOCK MOVE PREPARE PURGE REFRESH INCREMENTAL MATERIALIZED VIEW REINDEX RESET ROLLBACK ROLLBACK TO SAVEPOINT SELECT SET SET ROLE SET TRANSACTION SHUTDOWN START TRANSACTION TRUNCATE VACUUM SHRINK DROP GLOBAL CONFIGURATION