Question

我想将小数位改为4，但无法弄明白，帮助！

- 查询

select CASE v2.[ie version]
      When '11' Then 'Internet Explorer 11'
      When '9' Then 'Internet Explorer 9'
      When '8' Then 'Internet Explorer 8'
      Else [IE Version] End [IE Version],
COUNT(distinct v1.guid) 'Total Count', COUNT(*) *100.00 / SUM(COUNT(*)) over()'Total Percentage' from vcomputer v1
inner join vIEVersions v2 on v1.guid = v2.guid where v1.ismanaged = '1'
and v2.[IE Version] is not Null and v2.[IE Version] not in ('Unknown', '7', '10')
group by v2.[IE Version] order by 1 desc

- 输出

IE Version               Total Count    Total Percentage
Internet Explorer 9      180            1.7349397590361
Internet Explorer 8      531            5.1180722891566
Internet Explorer 11     9664           93.1469879518072

Answer 1

我认为首先你必须先得到CREATE TABLE VIEW小数百分比细分，然后调用round函数得到总和的值，如下例所示：

SELECT ROUND(column_name,decimals) FROM table_name;

希望它有所帮助。

Answer 2

CAST到十进制应该足够了：

CAST(COUNT(*) *100.00 / SUM(COUNT(*)) over() as decimal(12,4))

Answer 3

试试这个例子，

宣布@i int = 23

选择演员表（@ i * 100.00 / 3为十进制（10,4））

带小数百分比细分的SQL计数 - 如何限制为4位小数？

3 个答案: