我试图转换一些decimals
到varchar
,但他们得到四舍五入。为什么这个Sql Server CAST(..)将Decimal舍入到VarChar?
有人能告诉我为什么吗?
declare @UpperLeftLatitude DECIMAL,
@UpperLeftLongitude DECIMAL,
@BottomRightLatitude DECIMAL,
@BottomRightLongitude DECIMAL
SET @UpperLeftLatitude = 38.663
SET @UpperLeftLongitude = -122.857
SET @BottomRightLatitude = 37.795
SET @BottomRightLongitude = -121.219
DECLARE @SearchRectangleString VARCHAR(MAX);
SET @SearchRectangleString = 'POLYGON((' + CONVERT(VARCHAR(50), @UpperLeftLatitude) + ' ' + CAST(@UpperLeftLongitude AS VARCHAR(50)) + ','
+ CAST(@BottomRightLatitude AS VARCHAR(50)) + ' ' + CAST(@UpperLeftLongitude AS VARCHAR(50)) + ','
+ CAST(@BottomRightLatitude AS VARCHAR(50)) + ' ' + CAST(@BottomRightLongitude AS VARCHAR(50)) + ','
+ CAST(@UpperLeftLatitude AS VARCHAR(50)) + ' ' + CAST(@BottomRightLongitude AS VARCHAR(50)) + ','
+ CAST(@UpperLeftLatitude AS VARCHAR(50)) + ' ' + CAST(@UpperLeftLongitude AS VARCHAR(50)) + '))';
SELECT @SearchRectangleString
-------------------
POLYGON((39 -123,38 -123,38 -121,39 -121,39 -123))
(1 row(s) affected)
注:是的,我知道我的纬度/多头周围走错了路。我会尽快切换。
远远地抱-发芽。我想在经历了15年的Sql之后,我会选择那个shiz。该回家了。脑中的单个脑细胞非常疲倦。谢了哥们! – 2010-07-28 07:46:40