0
SELECT top 1
case
when VR = -99999.99
then 0
else cast((VR*1.732) as decimal(38,3))
end
FROM pseb.dbo.datasource
where FeederID=5003
order by datetime desc
上述查詢工作正常,但我需要返回VARCHAR值「 - 」,而不是返回0選擇case語句錯誤
,如果我做這樣的
SELECT top 1
case
when VR = -99999.99
then '--'
else cast((VR*1.732) as decimal(38,3))
end
FROM pseb.dbo.datasource
where FeederID=5003
order by datetime desc
意味着它返回以下錯誤:
Msg 8114, Level 16, State 5, Line 1 Error converting data type varchar to numeric.
請幫我解決這個問題