Question

计算每个财政年度加入公司的人数。 4月1日至3月31日。

select
case when month(joinDate)>=7 THEN concat(year(joindate),year(joindate)+1)
     else concat (year(joinDate)-1,year(joindate))
     end as Financial_Year
from employees
group by Financial_Year

Answer 1

您可以使用ADD_MONTHS和EXTRACT函数来实现相同的功能。

SELECT
    FINANCIAL_YEAR || '-' || FINANCIAL_YEAR + 1 AS FINANCIAL_YEAR,
    NUMBER_OF_EMPLOYEES_JOINED
FROM
    (
        SELECT
            EXTRACT(YEAR FROM ADD_MONTHS(JOINDATE, - 3)) FINANCIAL_YEAR,
            COUNT(1) NUMBER_OF_EMPLOYEES_JOINED
        FROM
            EMPLOYEES
        GROUP BY
            EXTRACT(YEAR FROM ADD_MONTHS(JOINDATE, - 3))
    );

干杯！

Answer 2

select count(*),
case when month(joinDate)>=7 THEN concat(year(joindate),year(joindate)+1)
     else concat (year(joinDate)-1,year(joindate))
     end as Financial_Year
from employees
group by Financial_Year

使用简单的COUNT（*）聚合函数即可完成工作

Answer 3

只需减去（或添加）6个月并累加：

select add_months(join_date, -6) as fiscal_year,
       count(*)
from employees
group by add_months(join_date, -6)
order by min(join_date);

如果您希望结果为“ 2019-2020”，则：

select extract(year from add_months(join_date, -6)) || '-' || extract(year from add_months(join_date, +6)) as fiscal_year,
       count(*)
from employees
group by extract(year from add_months(join_date, -6)) || '-' || extract(year from add_months(join_date, +6))
order by min(join_date);

如果您尝试在MySQL中执行此操作（语法建议）：

select concat_ws('_',
                 year(join_date - interval 6 month),
                 year(join_date + interval 6 month
                ) as fiscal_year,
         count(*)
from employees
group by fiscal_year;

ORACLE SQL Group财务年度

3 个答案: