如何在 SQL 中将 nvarchar 转换为十进制

Question

How to convert an nvarchar to decimal in SQL Server?

I need to convert a value like '38,716.1311' to 38716.1311.

I have tried using this method but can't successfully convert:

DECLARE @TempValue NVARCHAR(100) = '38,716.1311'

SELECT 
    CONVERT(DECIMAL(18, 2), @TempValue) 

Can anyone suggest the correct query? Thanks in advance

Answer 1

只需在转换前从字符串中删除逗号：

Select CONVERT(DECIMAL(18,2),replace('38,716.1311', ',', '')) 

Answer 2

Declare @TempValue nvarchar(100)
    SET @TempValue = Replace('38,716.1311',',','')
Select cast(@TempValue AS DECIMAL(18,2)) 

--we can not convert value Like "38,716.1311" (NVARCHAR) To DECIMAL so first we replace "," with blank "38716.1311" then convert with DECIMAL

Answer 3

Remove the comma by using REPLACE like so:

Declare @TempValue nvarchar = '38,716.1311'
Select CONVERT(DECIMAL(18,2), REPLACE(@TempValue, ',', ''))

Answer 4

Its better if the @TempValue is MONEY so it disregard the comma separated

Declare @TempValue MONEY =  '38,716.1311'
Select CAST(@TempValue AS DECIMAL(18,2))

Answer 5

Use MONEY data type and convert into decimal data type:

DECLARE @Col MONEY = '38,716.1311'
SELECT CONVERT(DECIMAL(20,4),@Col) 

OR Replace comma and convert into decimal

DECLARE @Col VARCHAR(100)  = '38,716.1311'
SELECT CONVERT(DECIMAL(20,4),REPLACE(@Col,',',''))

Answer 6

In my case for example some data like: version: '1.2.12'

I want to register like version: 1.212 in Sql

1. Clean the varchar ( eliminate dot or commas )

2. Cast to char (6 digit) and pad with 0 the empty spaces. (Catch null with coalesce)

3. Cast to numeric and divide to 100000

4. Cast to decimal (10,4)

Result ->> version 1.212

Select 'version'=cast(cast(replace(cast(replace(coalesce([##DATA##],'0'), '.', '') as char(6)),' ','0')as numeric(6))/100000 as decimal (10,4)

Maybe there is another solution which is more simple.