奇怪的sql

本文主要是介绍奇怪的sql，对大家解决编程问题具有一定的参考价值，需要的程序猿们随着小编来一起学习吧！

身份证按年龄段分组统计

SELECT
    CASE
WHEN (age >= 10 AND age <= 28) THEN
    '10-28'
WHEN (age >= 29 AND age <= 38) THEN
    '29-38'
ELSE
    '38-'
END 'eag_layer',
 count(*) emps
 
from
(SELECT F_IDCard,FLOOR(DATEDIFF(DY, substring(F_IDCard,7,4), GETDATE()) / 365.25) as age FROM [WisdomPoliceStation].[dbo].[T_InternetBarRecord])as b

GROUP BY
    CASE
WHEN (age >= 10 AND age <= 28) THEN
    '10-28'
WHEN (age >= 29 AND age <= 38) THEN
    '29-38'
ELSE
    '38-'
END
ORDER BY
    1;

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