SQL CASE语句

Question

SQL Server 2000中可能存在以下情况吗？

CREATE FUNCTION getItemType (@code varchar(18)) 
RETURNS int 
AS 
BEGIN 
Declare @Type tinyint 
Select @Type = case len(@code) 
WHEN 12,14,17 THEN 1 
WHEN 13,15,18 THEN 2 
WHEN 8,10 THEN 3 
ELSE 0 
END 
RETURN (@Type) 
END 

谢谢。

Answer 1

试试这个：

Select @Type = 
(select case 
WHEN len(@code) IN (12,14,17) THEN 1 
WHEN len(@code) IN (13,15,18) THEN 2 
WHEN len(@code) IN (8,10) THEN 3 
ELSE 0 
END) 

Answer 2

try 
    SELECT CASE 
      WHEN LEN(@gcode) IN(x, y, z) THEN a 
     END 
etc. 

，或者您可能需要

SELECT CASE LEN(@gcode) 
     WHEN x THEN a 
     WHEN y THEN a 
     END 

等

Here's the reference.

Answer 3

这应做到：

CREATE FUNCTION getItemType(@code VARCHAR(18)) 
RETURNS INT 
AS 
BEGIN 
    RETURN CASE 
     WHEN LEN(@code) IN (12,14,17) THEN 1 
     WHEN LEN(@code) IN (13,15,18) THEN 2 
     WHEN LEN(@code) IN (8,100) THEN 3 
     ELSE 0 
    END 
END