在SSMS的SQL查询中将千克转换为克

Question

在下面的代码中，有一个列名为birthweight的列名，当前在其拉动表格中以“ kg”显示，但我希望通过将kg转换为g以克显示

例如，现在显示为2.92千克，我需要将其转换为2920.00克

YEAR(HimVisit.DischargeDateTime) AS 'Year',
DATENAME(qq,HimVisit.DischargeDateTime) AS 'Dqtr',
'' AS 'Cs1', '' AS 'Cs2', '' AS 'Cs3', '' AS 'Dmv',
ISNULL(Visit.WeightField, '') AS 'Birthweight',
FORMAT(Him.Birthdate,'yyyyMMdd') AS 'Birth.date',
FORMAT(Reg.AdmitDateTime,'yyyyMMdd') AS 'Admit.date',
FORMAT(Bar.DischargeDate,'yyyyMMdd') AS 'Discharge.date',
Reg.AccountNumber AS 'PatientID'

请有人可以更改此SQL以将输出显示为2920.00 g而不是2.92 kg吗？

Answer 1

我认为您需要这个：

select cast((cast(rtrim(replace(birthweight, 'kg', '')) as float) * 1000) as varchar(50)) + ' g' birthweight from yourtable

Answer 2

如果您确实需要，可以创建一个函数来执行此操作。 我没有完全测试一下，但应该给您一个想法。

CREATE FUNCTION dbo.converter (@kg decimal)  
RETURNS decimal  
WITH EXECUTE AS CALLER  
AS  
BEGIN  
 DECLARE @g decimal
 SET @g = @kg * 1000

 RETURN(@g);  
END; 

您可以在SELECT语句中这样称呼它

SELECT CAST(dbo.converter([Your_KG_Column]) as decimal(18,2))

Answer 3

不知道真实数据可能是什么样子，所以我只是扔了一些东西。 也许这会有所帮助。

declare @Something table
(
    BirthWeight varchar(10)
)

insert @Something values
('2.92 kg')
, ('3.44 kg')
, ('1.89 kg')

select *
    , convert(varchar(10), convert(int, convert(decimal(7,2), replace(s.BirthWeight, ' kg', '')) * 1000)) + ' g'
from @Something s

Answer 4

使用CASE，LEFT，PATINDEX和几个CONVERT。

-- Sample data
declare @TestTable table (id int identity(1,1) primary key, WeightField varchar(12));
insert into @TestTable (WeightField) values
 ('3.123459 kg')
,('5.21 kg')
,('9.36 lbs')
,('10.22 KG')
,(NULL)
;

SELECT 
(CASE 
 WHEN Visit.WeightField LIKE '[0-9]%[0-9] kg' -- Only convert the kg when WeightField has a specific format
 THEN CONVERT(VARCHAR(8), CONVERT(DECIMAL(8,2), CONVERT(FLOAT, LEFT(Visit.WeightField, PATINDEX('%[0-9] kg%', Visit.WeightField))) * 1000))+' g'
 WHEN Visit.WeightField IS NULL THEN ''
 ELSE LTRIM(RTRIM(Visit.WeightField))
 END) AS [BirthWeight]
FROM @TestTable AS Visit;