[NOT]  BETWEEN...AND..【不】在范围之内

SELECT 15 BETWEEN 10 AND 30;

1

SELECT 15 NOT BETWEEN 10 AND 30;

0

[NOT]IN()【不】在列出的范围内

SELECT 10 IN(5，10，20，30);

1

SELECT 10 NOT IN(5，10，20，30);

0

IS [NOT] NULL【不】为空

SELECT NULL IS NULL;

1

SELECT '' IS NULL;

0

SELECT 0 IS NULL;

0