Question

我有这样的数据

compnay         employee    service_start_Date  service_end_Date   service_status
abc company     david       01/01/2017          1/1/1900            in_service
abc comapny     john        12/02/2016          1/1/1900            in_service
defcompany      abc_1       05/12/2011          12/02/2017          regisned
ghgcompany      rock        02/11/2009          04/03/2017          terminated
abc company1    david1      01/01/2017          1/1/1900            in_service
abc company     david2      01/01/2017          1/1/1900            in_service
abc company2    david3      01/01/2017          1/1/1900            in_service
abc company     david4      01/01/2015          1/1/2017            in_service
abc company2    david5      01/01/2017          1/1/1900            in_service

......还有很多这样的数据

这里当员工没有辞职/终止/过期时，默认日期设置如此1/1/1900 当员工辞职/ termindate / expired时，service_end_date被标记为所以我想要数据比如根据月份和年份加入和离开的员工数量像这样

如果我选择参数第1个月和2017年，那么这个节目就像这样

company          joiners  leavers
abc company         3        1
abc company1        3        0

当我选择像2011年和2011年那样的时候，这就像这样显示

company    joiners  leavers
defcompany  1        0

我试过这个

select  e.company,count(e.EmployeeIndex) joiners,count(e.EmployeeIndex) leavers
            from    emp_table e 
            where                   

                     service_end_Date between 
                    convert(datetime,rtrim(convert(char,@FromDate,101)),101) 
                     and  convert(datetime,rtrim(convert(char,@ToDate,101)),101) 

                     and service_start_Date between 
                    convert(datetime,rtrim(convert(char,@FromDate,101)),101) 
                     and  convert(datetime,rtrim(convert(char,@ToDate,101)),101) 
        group by e.company

    this query did not show correct data..

Answer 1

您当前的查询对于加入者和离开者都计算两次相同的事情。您需要将检查移动到这些列的选择区域。这是基本的想法

select  e.company,
    SUM(case when service_start_date between @FromDate and @ToDate then 1 else 0 end) as joiners
    , SUM(case when service_end_date between @FromDate and @ToDAte then 1 else 0 end) as leavers

from    emp_table e 
        where                   
            service_end_Date between @FromDate and @ToDate
        OR --not AND
            service_start_Date between @FromDate and @ToDate
group by e.company

你可以将整个底部的where子句关闭，它仍然可以工作，但即使两个数字都为零（这可能是想要或不想），它也会返回所有公司。

Answer 2

您可以使用以下查询来实现此目的：

SELECT *
 FROM (
  SELECT employee, compnay
  ,Case when year(service_end_Date) = 1900 then
  'joiners'
  else 
  'leavers' end as Company_Year
  FROM [emp_table] 
  -- where  year(service_start_Date) = 2011  and month(service_start_Date) = 5
 ) as s
 PIVOT
 (
  count(employee)
  FOR [Company_Year] IN (joiners,leavers)
 )AS pvt;

根据日期的数据

2 个答案: