SQL服务器return语句

Question

我有此查询：

SELECT t.price/100 as P 
FROM mytable.user as t 
WHERE t.price = ?; 

但我要检查，如果该参数值为零的SELECT之前，以避免SQL错误，所以我已经试过这样：

IF (CAST(? AS float) = 0) 
BEGIN 
    RETURN 0 
END 
ELSE 
BEGIN 
    SELECT t.price/100 as P 
    FROM mytable.user as t 
    WHERE t.price = ? 
END; 

但我有此错误消息（第3行）：

具有返回值A RETURN语句不能在此 上下文中使用。

Answer 1

不要使用return 0而是使用select 0作为p。以下是样本。

IF (CAST(? AS float) = 0) 
BEGIN 
    select 0 as P 
END 
ELSE 
BEGIN 
    SELECT t.price/100 as P 
    FROM mytable.user as t 
    WHERE t.price = ? 
END;