Question

我有这个存储过程：

ALTER PROCEDURE NearUnits
    @lat float,
    @lng float
AS
BEGIN
SELECT * 
FROM
(
  SELECT Uname, Latitude, Longitude,Info, 
  (
     6371 * acos(
       sin(@lat/57.295800) * 
       sin(Latitude/57.295800) + 
       cos(@lat/57.295800) * 
       cos(Latitude/57.295800) * 
       cos(@lng/57.295800 - Longitude / 57.295800)
     )
  ) AS distance 
  FROM [dbo].[MedicalUnit]
) mytable
WHERE distance <= 20;
END;

执行时：

NearUnits 31.0333449532716,31.3618322632

我收到此错误：

Msg 8114，Level 16，State 5，Procedure NearUnits，Line 6 将数据类型nvarchar转换为数字时出错。

虽然之前它正常工作!!!

任何解决方案??

Answer 1

托盘投射纬度或经度：

ALTER PROCEDURE NearUnits
    @lat float,
    @lng float
AS
BEGIN
SELECT * 
FROM
(
  SELECT Uname, Latitude, Longitude,Info, 
  (
     6371 * acos(
       sin(@lat/57.295800) * 
       sin(CAST(Latitude AS float)/57.295800) + 
       cos(@lat/57.295800) * 
       cos(CAST(Latitude AS float)/57.295800) * 
       cos(@lng/57.295800 - CAST(Longitude AS float) / 57.295800)
     )
  ) AS distance 
  FROM [dbo].[MedicalUnit]
) mytable
WHERE distance <= 20;
END;

存储过程将数据类型nvarchar转换为数字时出错

1 个答案: