sql - 如何根据字段中的值截断或添加小数点 - SQL Server

Question

这是一个示例代码

declare @Currency table (ccy char(3),amount money)
insert into @Currency
values ('USD',12.34), ('AUD',12.34), ('INR',12.34)

我需要如下显示输出，

when ccy = 'USD' then 12 (No decimals- cut off after decimal values) 

when ccy = 'AUD' then 12.34 (Two decimals)

when ccy = 'INR' then 12.3400 (Four decimals)

预期输出:

 ccy    amount

 USD    12
 AUD    12.34
 INR    12.3400

请告诉我如何在 Tsql 中实现这一点。

Answer 1

试试这个:

declare @Currency table (ccy char(3),amount money)
insert into @Currency
values ('USD',1234), ('AUD',1234), ('INR',1234)

SELECT ccy,
    CASE WHEN ccy = 'USD' THEN CAST(CAST(amount AS NUMERIC(16,0)) AS VARCHAR)
         WHEN ccy = 'AUD' THEN CAST(CAST(amount AS NUMERIC(16,2)) AS VARCHAR)
         WHEN ccy = 'INR' THEN CAST(CAST(amount AS NUMERIC(16,4)) AS VARCHAR)
    END amount
FROM @Currency

输出:

ccy amount
USD 1234
AUD 1234.00
INR 1234.0000

检查 # SQL Fiddle 中的答案