Reserved words define possible future keywords that may be added for ANSI compliance and/or new features. Because these words may become keywords, they should not be used for object names. These words are reserved for future use:
| ABSOLUTE | ACTION | ALLOCATE |
| ARE | ASSERTION | AT |
| AUTHORIZATION | BOTH | CASCADE |
| CASCADED | CAST | CATALOG |
| CHAR_LENGTH | CHARACTER | CHARACTER_LENGTH |
| COLLATE | COLLATION | COLUMN |
| CONNECT | CONNECTION | CONSTRAINTS |
| CORRESPONDING | DATE | DAY |
| DEFERRABLE | DEFERRED | DESCRIBE |
| DESCRIPTOR | DIAGNOSTICS | DISCONNECT |
| DOMAIN | END_EXEC | ESCAPE |
| EXCEPTION | EXPIREDATE | EXTERNAL |
| EXTRACT | FALSE | FILE |
| FIRST | FULL | GET |
| GLOBAL | HOUR | IMMEDIATE |
| INITIALLY | INNER | INPUT |
| INTERVAL | JOIN | LAST |
| LEADING | LEFT | LOCAL |
| MATCH | MINUTE | MONTH |
| NAMES | NATIONAL | NATURAL |
| NCHAR | NEXT | NO |
| OCTET_LENGTH | OUTER | OUTPUT |
| OVERLAPS | PAD | PARTIAL |
| POSITION | PRESERVE | PRIOR |
| PRIVILEGES | RELATIVE | RESTRICT |
| RETAINDAYS | RIGHT | ROWS |
| SCHEMA | SECOND | SESSION |
| SIZE | SPACE | SQLSTATE |
| TIME | TIMESTAMP | TIMEZONE_HOUR |
| TIMEZONE_MINUTE | TRAILING | TRANSLATE |
| TRANSLATION | TRUE | UNKNOWN |
| USAGE | USING | VALUE |
| VOLUME | WORK | WRITE |
| YEAR | ZONE |
| Identifiers |