I've been trying display all employees with their 1 or more year experience , but it keeps showing all , i'm using DATEDIFF(YEAR,Hired_Date,GETDATE()) >= 1 in where clause but even with less that a yr experience, it keeps showing.
员工人数
ID Hired_Date
001 2018-05-01
002 2018-03-01
003 2020-05-01
004 2019-12-05
005 2017-03-01
DATEDIFF(YEAR,EmpStartDate ,GETDATE()) >= 1
显示日历年的差异。因此2019-12-31和2020-01-01相隔1个日历年。
Depending on how precise you need it to be, you should probably use month instead of year.
您的查询存在的问题是DATEDIFF给出了diff的天数，您可以将其除以365，将其转换为年。请执行以下查询：
SELECT ID, Hired_Date WHERE (DATEDIFF(now(), hire_date))/365>=1;
In your Query you are using EmpStartDate instead of Hired_Date.
select * from @T
where DATEDIFF(YEAR,Hired_Date ,GETDATE())>=1
SELECT *
FROM Employee_Tb
WHERE Hired_Date<CONVERT(DATE,DATEADD(year, -1, GETDATE()))
