Question

我觉得自己很愚蠢，因为我可以轻松地在java或C＃中使用for循环执行此操作，但我是SQL的新手，我无法解决这个问题。到目前为止，我已经为我想要找到共同因子的数字声明了两个整数变量。然而，根据我正在阅读的SQL，我需要使用while循环来循环数字以找到常见因素，我是否在正确的轨道上？之后我只想让SQL服务器打印常见因素。这是我到目前为止的代码......

DECLARE @num1 int = 10;
DECLARE @num2 int = 20;
DECLARE @count INT = 1;

WHILE @count < @num1
BEGIN
IF (@num % @count = ?)
PRINT 'common factors'
END

我在这里至少走在正确的轨道上吗？在此先感谢您的任何帮助

Answer 1

尝试没有循环的这个：

declare @num1 int
declare @num2 int
declare @f varchar(4000)
select @num1 = 12, @num2 = 26, @f = ''

;with lv0 as (select 0 g union all select 0)
    ,lv1 as (select 0 g from lv0 a cross join lv0 b) -- 4
    ,lv2 as (select 0 g from lv1 a cross join lv1 b) -- 16
    ,lv3 as (select 0 g from lv2 a cross join lv2 b) -- 256
    ,tally (n) as (select row_number() over (order by (select null)) from lv3)
select @f = @f + ', ' + convert(varchar(4000),n)
from tally
where 
    n <= @num1
    and @num1 % n = 0
    and @num2 % n = 0
print stuff(@f, 1, 2, '')

Answer 2

谢谢大家，user3530547链接帮助我解决了问题。我保持循环并使用它...

USE md0577283
DECLARE @num1 int = 10;
DECLARE @num2 int = 20;
DECLARE @count INT = 1;

WHILE @count < @num1
BEGIN
IF (@num1 % @count = 0 and @num2 % @count = 0)
PRINT @count
set @count = @count + 1
END

SQL +打印两个数字的公因数

2 个答案: