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  • sql server 保留小数(续A)

    写完上一篇文章后,陆续有朋友给出了其他思路,我在小结在这篇博客中。

    思路一:转换成字符串后输出(这也是上一篇文章给的思路)

    1 1 SELECT  CASE  WHEN @a % @b = 0  THEN CAST(@a / @b AS VARCHAR(16)) 
    2 2               ELSE  CAST(CAST(@a * 1.0 / @b AS DECIMAL(10,4)) AS VARCHAR(32)) END '12 / 5',
    3 3         CASE  WHEN @c % @d = 0  THEN CAST(@c / @d AS VARCHAR(16))
    4 4               ELSE  CAST(CAST(@c * 1.0 / @d AS DECIMAL(10,4)) AS VARCHAR(32)) END '12 / 3'
    View Code

    思路二:使用Replace()函数来判断小数点后面的形式

    1 DECLARE @a INT,@b INT,@c INT,@d INT
    2 SET @a    = 12
    3 SET @b  = 5
    4 SET @c = 12
    5 SET @d = 3        
    6 SELECT REPLACE(CAST(@a * 1.0 / @b AS DECIMAL(10,4)),'.0000','') '12 / 5',
    7        REPLACE(CAST(@c * 1.0 / @d AS DECIMAL(10,4)),'.0000','') '12 / 3'
    View Code

    思路三:使用Round()函数判断四舍五入后的结果与原始结果是否相等

     1 DECLARE @a INT,@b INT,@c INT,@d INT
     2 SET @a    = 12
     3 SET @b  = 5
     4 SET @c = 12
     5 SET @d = 3    
     6 SELECT      CASE   WHEN ROUND(@a * 1.0 / @b,0) = @a * 1.0 / @b  THEN  CAST(@a / @b AS VARCHAR(16))
     7                  ELSE CAST(CAST(@a * 1.0 / @b AS DECIMAL(10,4)) AS VARCHAR(32)) END '12 / 5',
     8                  
     9           CASE   WHEN ROUND(@c * 1.0 / @d,0) = @c * 1.0 / @d THEN  CAST(@c / @d AS VARCHAR(16)) 
    10                  ELSE CAST(CAST(@c * 1.0 / @d AS DECIMAL(10,4)) AS VARCHAR(32)) END '12 / 3'          
    View Code

    以上三种思路的运行结果都是:

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  • 原文地址:https://www.cnblogs.com/freecodeX/p/3819619.html
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