Full list of reserved words in Firebird 2.5:
         
            
               
                  
                     | ADD | 
                     ADMIN | 
                     ALL | 
                  
                  
                     | ALTER | 
                     AND | 
                     ANY | 
                  
                  
                     | AS | 
                     AT | 
                     AVG | 
                  
                  
                     | BEGIN | 
                     BETWEEN | 
                     BIGINT | 
                  
                  
                     | BIT_LENGTH | 
                     BLOB | 
                     BOTH | 
                  
                  
                     | BY | 
                     CASE | 
                     CAST | 
                  
                  
                     | CHAR | 
                     CHAR_LENGTH | 
                     CHARACTER | 
                  
                  
                     | CHARACTER_LENGTH | 
                     CHECK | 
                     CLOSE | 
                  
                  
                     | COLLATE | 
                     COLUMN | 
                     COMMIT | 
                  
                  
                     | CONNECT | 
                     CONSTRAINT | 
                     COUNT | 
                  
                  
                     | CREATE | 
                     CROSS | 
                     CURRENT | 
                  
                  
                     | CURRENT_CONNECTION | 
                     CURRENT_DATE | 
                     CURRENT_ROLE | 
                  
                  
                     | CURRENT_TIME | 
                     CURRENT_TIMESTAMP | 
                     CURRENT_TRANSACTION | 
                  
                  
                     | CURRENT_USER | 
                     CURSOR | 
                     DATE | 
                  
                  
                     | DAY | 
                     DEC | 
                     DECIMAL | 
                  
                  
                     | DECLARE | 
                     DEFAULT | 
                     DELETE | 
                  
                  
                     | DELETING | 
                     DISCONNECT | 
                     DISTINCT | 
                  
                  
                     | DOUBLE | 
                     DROP | 
                     ELSE | 
                  
                  
                     | END | 
                     ESCAPE | 
                     EXECUTE | 
                  
                  
                     | EXISTS | 
                     EXTERNAL | 
                     EXTRACT | 
                  
                  
                     | FETCH | 
                     FILTER | 
                     FLOAT | 
                  
                  
                     | FOR | 
                     FOREIGN | 
                     FROM | 
                  
                  
                     | FULL | 
                     FUNCTION | 
                     GDSCODE | 
                  
                  
                     | GLOBAL | 
                     GRANT | 
                     GROUP | 
                  
                  
                     | HAVING | 
                     HOUR | 
                     IN | 
                  
                  
                     | INDEX | 
                     INNER | 
                     INSENSITIVE | 
                  
                  
                     | INSERT | 
                     INSERTING | 
                     INT | 
                  
                  
                     | INTEGER | 
                     INTO | 
                     IS | 
                  
                  
                     | JOIN | 
                     LEADING | 
                     LEFT | 
                  
                  
                     | LIKE | 
                     LONG | 
                     LOWER | 
                  
                  
                     | MAX | 
                     MAXIMUM_SEGMENT | 
                     MERGE | 
                  
                  
                     | MIN | 
                     MINUTE | 
                     MONTH | 
                  
                  
                     | NATIONAL | 
                     NATURAL | 
                     NCHAR | 
                  
                  
                     | NO | 
                     NOT | 
                     NULL | 
                  
                  
                     | NUMERIC | 
                     OCTET_LENGTH | 
                     OF | 
                  
                  
                     | ON | 
                     ONLY | 
                     OPEN | 
                  
                  
                     | OR | 
                     ORDER | 
                     OUTER | 
                  
                  
                     | PARAMETER | 
                     PLAN | 
                     POSITION | 
                  
                  
                     | POST_EVENT | 
                     PRECISION | 
                     PRIMARY | 
                  
                  
                     | PROCEDURE | 
                     RDB$DB_KEY | 
                     REAL | 
                  
                  
                     | RECORD_VERSION | 
                     RECREATE | 
                     RECURSIVE | 
                  
                  
                     | REFERENCES | 
                     RELEASE | 
                     RETURNING_VALUES | 
                  
                  
                     | RETURNS | 
                     REVOKE | 
                     RIGHT | 
                  
                  
                     | ROLLBACK | 
                     ROW_COUNT | 
                     ROWS | 
                  
                  
                     | SAVEPOINT | 
                     SECOND | 
                     SELECT | 
                  
                  
                     | SENSITIVE | 
                     SET | 
                     SIMILAR | 
                  
                  
                     | SMALLINT | 
                     SOME | 
                     SQLCODE | 
                  
                  
                     | SQLSTATE (2.5.1)
                      | 
                     START | 
                     SUM | 
                  
                  
                     | TABLE | 
                     THEN | 
                     TIME | 
                  
                  
                     | TIMESTAMP | 
                     TO | 
                     TRAILING | 
                  
                  
                     | TRIGGER | 
                     TRIM | 
                     UNION | 
                  
                  
                     | UNIQUE | 
                     UPDATE | 
                     UPDATING | 
                  
                  
                     | UPPER | 
                     USER | 
                     USING | 
                  
                  
                     | VALUE | 
                     VALUES | 
                     VARCHAR | 
                  
                  
                     | VARIABLE | 
                     VARYING | 
                     VIEW | 
                  
                  
                     | WHEN | 
                     WHERE | 
                     WHILE | 
                  
                  
                     | WITH | 
                     YEAR | 
                       |