使用sql server拆分数字

Question

我有一个选择查询我想将数字拆分为3个值。请帮我这样做。

SELECT Code FROM Source

Code
----------------
21859633525935

我想将Code拆分为3个值，并使用SELECT查询显示在3列中，即：

First value      Second value     Third value
--------------------------------------------------- 
21               85963            3525935

Answer 1

如果输入是字符类型（char，varchar），那么各种字符串函数将执行此操作：

SELECT 
    First  = LEFT(code,2), 
    Second = SUBSTRING(code, 3, 5), 
    Third  = SUBSTRING(code, 8, 14) -- or RIGHT(code, 7)
FROM Source

如果是数字类型（例如bigint），则必须先将其转换为char类型：

SELECT 
    First  = LEFT(CAST(code AS varchar(14)),2), 
    Second = SUBSTRING(CAST(code AS varchar(14)), 3, 5), 
    Third  = SUBSTRING(CAST(code AS varchar(14)), 8, 14)
FROM Source

或者（如果是数字）你可以使用算术：

SELECT 
    CAST(code / 1000000000000 AS int),
    CAST((code / 1000000000000-CAST(code / 1000000000000 AS int))* 1000000 AS int),
    code % 10000000
FROM Source

Answer 2

首先检查数据类型的代码然后将其拆分

 IF (SELECT data_type 
    FROM Information_Schema.Columns 
    WHERE Table_Name= 'SOURCE'
    AND Column_Name = 'CODE' ) LIKE '%CHAR' --CHECK DATA TYPE OF CODE
BEGIN 
SELECT    substring([Code] ,1,2)   [First value],
          substring([Code] ,3,5)   [Second value],
          substring([Code] ,8,7)   [Third value]
FROM Source
END
ELSE
BEGIN
SELECT    substring(CONVERT(VARCHAR(50),[Code]) ,1,2)   [First value],
          substring(CONVERT(VARCHAR(50),[Code]) ,3,5)   [Second value],
          substring(CONVERT(VARCHAR(50),[Code]) ,8,7)   [Third value]
FROM Source
END