[NOT] BETWEEN...AND..【不】在范围之内
SELECT 15 BETWEEN 10 AND 30;//包括10和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
SELECT *FROM TEST WHERE FIRST_NAME IS NULL;
输出first_name是NULL的表。