如何在數值中添加分隔空白空間

Question

不幸的是，我無法在文檔中找到解決方案。

我想在特定的格式得到的數字，像這樣：

234652.24 --> 234 652.24 
42145124 --> 42 145 124 

select employee_id, to_char(salary, '??????') as "Salary 
from employees; 

Answer 1

可以指定the NLS_NUMERIC_CHARTACTERS setting爲部分the TO_CHAR() call，並使用G和Dformat model個佔位符：

with employees (employee_id, salary) as (
    select 1, 234652.24 from dual --> 234 652.24 
    union all select 2, 42145124 from dual --> 42 145 124 
) 
select employee_id, 
    to_char(salary, '999G999G999D99', 'NLS_NUMERIC_CHARACTERS=''. ''') as "Salary" 
from employees; 

EMPLOYEE_ID Salary   
----------- --------------- 
      1  234 652.24 
      2 42 145 124.00 

如果你不希望尾隨零的第二個值可以添加FM格式修改，這也消除了領先的空間（這是有允許一個減號，如果有任何負值）;但仍然留下了尾隨時期;您可以使用RTRIM()擺脫的是：

with employees (employee_id, salary) as (
    select 1, 234652.24 from dual --> 234 652.24 
    union all select 2, 42145124 from dual --> 42 145 124 
) 
select employee_id, 
    rtrim(to_char(salary, 'FM999G999G999D99', 'NLS_NUMERIC_CHARACTERS=''. '''), '.') as "Salary" 
from employees; 

EMPLOYEE_ID Salary   
----------- --------------- 
      1 234 652.24  
      2 42 145 124  

Answer 2

你一定要了解NLS_NUMERIC_CHARACTERS在https://docs.oracle.com/cd/B28359_01/olap.111/b28126/dml_options072.htm

Answer 3

例如，

to_char(1485, '9g999') ' 1 485' 
to_char(148.5, '999.999') ' 148.500' 
to_char(148.5, '999d999') ' 148,500' 
to_char(3148.5,'9g999d999') ' 3 148,500' 

Answer 4

我嘗試下面的查詢和輸出顯示在指定的格式

mysql> select format(id, '## ###') from test; 
+----------------------+ 
| format(id, '## ###') | 
+----------------------+ 
| 123,456    | 
| 123,456,789   | 
| 1     | 
| 10     | 
| 10,000    | 
+----------------------+ 
5 rows in set, 5 warnings (0.00 sec)