预留关键字
表1罗列了系统预留的关键字，以及它们在其他SQL标准中是否为预留关键字。如果需要使用这些关键字作为标识符，请加注双引号。
|
Keyword |
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 |
|
CONSTRAINT |
reserved |
reserved |
|
CREATE |
reserved |
reserved |
|
CROSS |
reserved |
reserved |
|
CUBE |
reserved |
reserved |
|
CURRENT_DATE |
reserved |
reserved |
|
CURRENT_PATH |
reserved |
reserved |
|
CURRENT_ROLE |
reserved |
reserved |
|
CURRENT_TIME |
reserved |
reserved |
|
CURRENT_TIMESTAMP |
reserved |
reserved |
|
CURRENT_USER |
reserved |
reserved |
|
DEALLOCATE |
reserved |
reserved |
|
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 |
reserved |
|
HAVING |
reserved |
reserved |
|
IN |
reserved |
reserved |
|
INNER |
reserved |
reserved |
|
INSERT |
reserved |
reserved |
|
INTERSECT |
reserved |
reserved |
|
INTO |
reserved |
reserved |
|
IS |
reserved |
reserved |
|
JOIN |
reserved |
reserved |
|
LEFT |
reserved |
reserved |
|
LIKE |
reserved |
reserved |
|
LOCALTIME |
reserved |
reserved |
|
LOCALTIMESTAMP |
reserved |
reserved |
|
NATURAL |
reserved |
reserved |
|
NORMALIZE |
reserved |
reserved |
|
NOT |
reserved |
reserved |
|
NULL |
reserved |
reserved |
|
ON |
reserved |
reserved |
|
OR |
reserved |
reserved |
|
ORDER |
reserved |
reserved |
|
OUTER |
reserved |
reserved |
|
PREPARE |
reserved |
reserved |
|
RECURSIVE |
reserved |
reserved |
|
RIGHT |
reserved |
reserved |
|
ROLLUP |
reserved |
reserved |
|
SELECT |
reserved |
reserved |
|
TABLE |
reserved |
reserved |
|
THEN |
reserved |
reserved |
|
TRUE |
reserved |
reserved |
|
UESCAPE |
reserved |
reserved |
|
UNION |
reserved |
reserved |
|
UNNEST |
reserved |
reserved |
|
USING |
reserved |
reserved |
|
VALUES |
reserved |
reserved |
|
WHEN |
reserved |
reserved |
|
WHERE |
reserved |
reserved |
|
WITH |
reserved |
reserved |
