CASE SQL语句中的比较符号“大于”

Question

I want to do comparison within a case statement. I've tried:

CASE DATEDIFF(MONTH, rs.MaturityDate, rs.PaymentDate) >1 AND <2 THEN 1 ELSE 0 END AS OneMonthDelay
,CASE DATEDIFF(MONTH, rs.MaturityDate, rs.PaymentDate) >2 AND <3 THEN 1 ELSE 0 END AS TwoMonthDelay

Any help would be appreciated.

Answer 1

CASE WHEN DATEDIFF(MONTH, rs.MaturityDateID, rs.PaymentDateID) > 1  
      AND DATEDIFF(MONTH, rs.MaturityDateID, rs.PaymentDateID) < 2 
     THEN 1 
     ELSE 0 
END AS OneMonthDelay

which makes by the way no sense ( >1 <2 )

Answer 2

Their point is INTEGERS are whole numbers. Therefore, nothing is ever GREATER than 1 AND SMALLER than 2, but there is EQUAL TO OR GREATER/LESS logic. If an item is to be GREATER than 1 but SMALLER than 2, it has to be a something like a decimal (1.1, 1.2, 1.201...)

Based off of your logic:

LOGIC: >1 <2
INPUT: 1
RESULT: 0

Because 1 is not GREATER than 1 AND LESS than 2. 1 is EQUAL to 1, but 1.01 is GREATER than 1

LOGIC => 1 =< 2 
INPUT: 1
RESULT: 1

Alternatively, I think you can do (someone might have to correct me on this)

EDIT:

Using juergen d's logic (Final edit, this should work):

CASE WHEN DATEDIFF(MONTH, rs.MaturityDateID, rs.PaymentDateID)
BETWEEN 1 AND 2    
THEN 1 
ELSE 0 
END AS OneMonthDelay

Your whole query should look like:

SELECT CASE 
WHEN DATEDIFF(MONTH, rs.MaturityDateID, rs.PaymentDateID)
BETWEEN 1 AND 2    
THEN 1 
ELSE 0
END AS OneMonthDelay,
CASE WHEN
DATEDIFF(MONTH, rs.MaturityDateID, rs.PaymentDateID)
BETWEEN 2 AND 3
THEN 1
ELSE 0
END AS TwoMonthDelay
FROM FooTable