保留关键字

下面表格罗列了AIR中所有预定的关键字及其在SQL标准中的状态。这些保留关键字若用作标识符，必须采用双引号进行引用。

Keyword (AIR)	SQL:2016	SQL-92
ALTER	reserved	reserved
AND	reserved	reserved
AS	reserved	reserved
BETWEEN	reserved	reserved
BY	reserved	reserved
CASE	reserved	reserved
CAST	reserved	reserved
CATALOG
CONSTRAINT	reserved	reserved
CREATE	reserved	reserved
CROSS	reserved	reserved
CUBE	reserved
CURRENT_DATE	reserved	reserved
CURRENT_TIME	reserved	reserved
CURRENT_TIMESTAMP	reserved	reserved
CURRENT_USER	reserved
CLUSTER
DEALLOCATE	reserved	reserved
DEFAULT
DELETE	reserved	reserved
DESCRIBE	reserved	reserved
DISTINCT	reserved	reserved
DROP	reserved	reserved
ELSE	reserved	reserved
END	reserved	reserved
ESCAPE	reserved	reserved
EXCEPT	reserved	reserved
EXECUTE	reserved	reserved
EXISTS	reserved	reserved
EXTRACT	reserved	reserved
FALSE	reserved	reserved
FOR	reserved	reserved
FROM	reserved	reserved
FULL	reserved	reserved
GROUP	reserved	reserved
GROUPING	reserved
HAVING	reserved	reserved
IN	reserved	reserved
INNER	reserved	reserved
INSERT	reserved	reserved
INTERNAL
INTERSCHEMA
INTERSECT	reserved	reserved
INTO	reserved	reserved
IS	reserved	reserved
JOIN	reserved	reserved
LEFT	reserved	reserved
LIKE	reserved	reserved
LOCALTIME	reserved
LOCALTIMESTAMP	reserved
METERIALIZATION
NATURAL	reserved	reserved
NORMALIZE	reserved
NOT	reserved	reserved
NULL	reserved	reserved
ON	reserved	reserved
OR	reserved	reserved
ORDER	reserved	reserved
OUTER	reserved	reserved
PREPARE	reserved	reserved
PROJECTION
RECURSIVE	reserved
REFRESH
RIGHT	reserved	reserved
ROLLUP	reserved
SELECT	reserved	reserved
SHOW
TABLE	reserved	reserved
THEN	reserved	reserved
TRUE	reserved	reserved
UESCAPE	reserved
UNION	reserved	reserved
UNNEST	reserved
USING	reserved	reserved
VALUES	reserved	reserved
VARIABLES
WHEN	reserved	reserved
WHERE	reserved	reserved
WITH	reserved	reserved