从出生日期计算年龄与年龄之间的条件

Question

我像这样使用 MySQL 计算年龄

A   12-10-2020  Plan A
A   12-10-2020  Plan B
A   12-10-2020  Plan C
B   16-10-2020  Plan A
C   25-10-2020  Plan A
C   25-10-2020  Plan B
D   27-10-2020  Plan A
D   27-10-2020  Plan C
E   29-10-2020  Plan A

但我想获取年龄和 MySQL 之间的数据，显示“年龄”的未知列，那么我该如何设置条件？

Answer 1

变体 1（表达式代替输出名称）：

SELECT timestampdiff(year, md.birthDate, curdate()) as age 
from user md
WHERE timestampdiff(year, md.birthDate, curdate()) BETWEEN 10 and 20

变体 2（HAVING 而不是 WHERE）：

SELECT timestampdiff(year, md.birthDate, curdate()) as age 
from user md
HAVING age BETWEEN 10 and 20