你应该把这两个日期放在单引号之间，比如..

select Date, TotalAllowance from Calculation where EmployeeId = 1
             and Date between '2011/02/25' and '2011/02/27'

或者可以使用

select Date, TotalAllowance from Calculation where EmployeeId = 1
             and Date >= '2011/02/25' and Date <= '2011/02/27'

请记住，第一次约会包含所有内容，但第二次约会就不包含所有内容，因为它实际上是“2011/02/27 00:00:00”。

SELECT CITY, COUNT(EID) OCCURENCES FROM EMP 
WHERE DOB BETWEEN '31-JAN-1900' AND '31-JAN-2900' 
GROUP BY CITY 
HAVING COUNT(EID) > 2;

该查询将查找DOB位于员工指定时间范围内的次数超过2次的城市。

由于没有指定时间段的datetime将具有date 00:00:00.000的值，如果您希望确保获得范围内的所有日期，则必须为结束日期提供时间，或者增加结束日期并使用<。

select Date,TotalAllowance from Calculation where EmployeeId=1 
and Date between '2011/02/25' and '2011/02/27 23:59:59.999'

OR

select Date,TotalAllowance from Calculation where EmployeeId=1 
and Date >= '2011/02/25' and Date < '2011/02/28'

OR

select Date,TotalAllowance from Calculation where EmployeeId=1 
and Date >= '2011/02/25' and Date <= '2011/02/27 23:59:59.999'

不要使用下面的语句，因为如果它们的时间是00:00:00.000，它可能会返回一些从2011/02/28开始的记录。

select Date,TotalAllowance from Calculation where EmployeeId=1 
and Date between '2011/02/25' and '2011/02/28'

Select 
    * 
from 
    Calculation 
where 
    EmployeeId=1 and Date between #2011/02/25# and #2011/02/27#;

select * from test 
     where CAST(AddTime as datetime) between '2013/4/4' and '2014/4/4'

——如果数据类型不同

/****** Script for SelectTopNRows command from SSMS  ******/
SELECT TOP 10 [Id]
  ,[Id_parvandeh]
  ,[FirstName]
  ,[LastName]
  ,[RegDate]
  ,[Gilder]
  ,[Nationality]
  ,[Educ]
  ,[PhoneNumber]
  ,[DueInMashhad]

  ,[EzdevajDate]


  ,[MarriageStatus]
  ,[Gender]
  ,[Photo]

  ,[ModifiedOn]
  ,[CreatorIp]
   From
  [dbo].[Socials] where educ >= 3 or EzdevajDate  >= '1992/03/31' and EzdevajDate <= '2019/03/09' and MarriageStatus = 1