不允许从数据类型datetime到int的隐式转换。使用coonvert函数运行此查询

Question

我正在尝试从存储过程中返回datetime变量

RETURN @StatusCode                >returns string
IF(@LastConnected IS NOT NULL)  
RETURN @LastConnected             >returns datetime (Error!!) when 

我删除了这一行，它执行得很好

Answer 1

使用SELECT代替RETURN

CREATE PROCEDURE dbo.GetLastConnectedDate
--- INPUT PARAMETERS IF ANY
AS
BEGIN
    SET NOCOUNT ON;

    ----- YOUR OTHER RELATED QUERIES

    IF(@LastConnected IS NOT NULL)  
            SELECT @LastConnected   ----- Use SELECT instead of RETURN here.

    RETURN @StatusCode
END
GO