El lenguaje SQL está compuesto de palabras reservadas, es decir, palabras especiales que ejecutan operaciones SQL.
| ABORT | DEC | LEADING | RESET |
| ADMIN | DECIMAL | LEFT | REUSE |
| AGGREGATE | DECODE | LIKE | RIGHT |
| ALIGN | DEFAULT | LIMIT | ROWS |
| ALL | DEFERRABLE | LISTEN | ROWSETLIMIT |
| ALLOCATE | DESC | LOAD | RULE |
| ANALIZAR | DISTINCT | LOCAL | SEARCH |
| ANALYZE | DISTRIBUTE | LOCK | SELECT |
| AND | DO | MATERIALIZED | SEQUENCE |
| ANY | ELSE | MINUS | SESSION_USER |
| AS | END | MOVE | SETOF |
| ASC | EXCEPT | NATURAL | SHOW |
| BETWEEN | EXCLUDE | NCHAR | SOME |
| BINARY | EXISTS | NEW | SUBSTRING |
| BIT | EXPLAIN | NOT | SYSTEM |
| BOTH | EXPRESS | NONULL | TABLE |
| CASE | EXTEND | NULL | THEN |
| CAST | EXTERNAL | NULLIF | TIES |
| CHAR | EXTRACT | NULLS | TIME |
| CHARACTER | FALSE | NUMERIC | TIMESTAMP |
| CHECK | FIRST | NVL | TO |
| CLUSTER | FLOAT | NVL2 | TRAILING |
| COALESCE | FOLLOWING | OFF | TRANSACTION |
| COLLATE | FOR | OFFSET | TRIGGER |
| COLLATION | FOREIGN | OLD | TRIM |
| COLUMN | FROM | ON | TRUE |
| CONSTRAINT | FULL | ONLINE | UNBOUNDED |
| COPY | FUNCTION | ONLY | UNION |
| CROSS | GENSTATS | OR | UNIQUE |
| CURRENT | GLOBAL | ORDER | USER |
| CURRENT_CATALOG | GROUP | OTHERS | USING |
| CURRENT_DATE | HAVING | OUT | VACÍO |
| CURRENT_DB | IDENTIFIER_CASE | OUTER | VARCHAR |
| CURRENT_SCHEMA | ILIKE | OVER | VERBOSE |
| CURRENT_SID | IN | OVERLAPS | VERSION |
| CURRENT_TIME | INDEX | PARTITION | VIEW |
| CURRENT_TIMESTAMP | INITIALLY | POSITION | WHEN |
| CURRENT_USER | INNER | PRECEDING | WHERE |
| CURRENT_USERID | INOUT | PRECISION | WITH |
| CURRENT_USEROID | INTERSECT | PRESERVE | WRITE |
| DEALLOCATE | INTERVAL | PRIMARY | RESET |
| INTO | REUSE |