SQL如何根据指定列的不同值区间分段,如人员表按年龄段区分

1. SELECT
2. COUNT(CASE WHEN NL BETWEEN 20 AND 30 THEN NL END) AS '20~30',
3. COUNT(CASE WHEN NL BETWEEN 30 AND 40 THEN NL END) AS '30~40',
4. COUNT(CASE WHEN NL BETWEEN 40 AND 50 THEN NL END) AS '40~50',
5. COUNT(CASE WHEN NL BETWEEN 50 AND 60 THEN NL END) AS '50~60',
6. COUNT(CASE WHEN NL BETWEEN 60 AND 70 THEN NL END) AS '60~70'
7. FROM
8. (SELECT DATEDIFF(YEAR,DATEOFBIRTH,CONVERT(NVARCHAR(20),GETDATE(),23)) NL FROM TABLENAME
9. WHERE ACCESSIONSTATE IN('1','2','6')
10. AND DATEOFBIRTH !=''
11. AND DATEOFBIRTH IS NOT NULL
12. AND DATEOFBIRTH < '1996-01-01') A

20~30	30~40	40~50	50~60	60~70
722	430	55	37	12

文章最后发布于: 2015-06-25