以下数据库视图将日期截断为会计年度（4月1日）：
CREATE OR REPLACE VIEW FISCAL_YEAR_VW AS
SELECT
CASE
WHEN to_number(to_char(SYSDATE, 'MM')) < 4 THEN
to_date('1-APR-'||to_char(add_months(SYSDATE, -12), 'YYYY'), 'dd-MON-yyyy')
ELSE
to_date('1-APR-'||to_char(SYSDATE, 'YYYY'), 'dd-MON-yyyy')
END AS fiscal_year
FROM
dual;
这允许我们根据今天的日期计算当前会计年度。
如何简化或优化此计算？
ADD_MONTHS(TRUNC(ADD_MONTHS(SYSDATE,-3),'YYYY'),3)
也许这......
SELECT to_date('01/04/' ||
to_char(extract(YEAR FROM SYSDATE)
- CASE WHEN extract(MONTH FROM SYSDATE) BETWEEN 1 AND 4 THEN 1 ELSE 0 END),
'DD/MM/YYYY') FROM dual;
我猜这是另一种选择......
SELECT add_months(trunc(SYSDATE) - extract(DAY FROM SYSDATE) + 1,
- (extract(MONTH FROM SYSDATE) + CASE
WHEN extract(MONTH FROM SYSDATE) <= 4 THEN 12 ELSE 0 END) + 4)
FROM dual;
其他选项是重写为返回日期的函数，或者如果您只需返回当前会计年度的年份数，则可以简化逻辑，因为您只需要to_char中的逻辑。
ADD_MONTHS(TRUNC(ADD_MONTHS(SYSDATE,-3),'YYYY'),3)
也许这......
SELECT to_date('01/04/' ||
to_char(extract(YEAR FROM SYSDATE)
- CASE WHEN extract(MONTH FROM SYSDATE) BETWEEN 1 AND 4 THEN 1 ELSE 0 END),
'DD/MM/YYYY') FROM dual;
我猜这是另一种选择......
SELECT add_months(trunc(SYSDATE) - extract(DAY FROM SYSDATE) + 1,
- (extract(MONTH FROM SYSDATE) + CASE
WHEN extract(MONTH FROM SYSDATE) <= 4 THEN 12 ELSE 0 END) + 4)
FROM dual;
其他选项是重写为返回日期的函数，或者如果您只需返回当前会计年度的年份数，则可以简化逻辑，因为您只需要to_char中的逻辑。
TRUNC（）可以有效地应用于具有不同格式掩码的日期。最有针对性的， trunc(sysdate, 'yyyy') 给了我们今年的第一天。所以这将给我们当年的01-APR ...
add_months(trunc(sysdate, 'yyyy'), 3)
这是前一年的日期......
add_months(trunc(add_months(sysdate, -12), 'yyyy'), 3)
所以：
CREATE OR REPLACE VIEW FISCAL_YEAR_VW AS
WITH cte as
( select add_months(trunc(sysdate, 'yyyy'), 3) as this_year
, add_months(trunc(add_months(sysdate, -12), 'yyyy'), 3) as last_year
from dual )
SELECT
CASE
WHEN SYSDATE >= cte.this_year THEN
cte.this_year
ELSE
cte.last_year
END AS fiscal_year
FROM
cte;
警告：我还没有机会测试这段代码，所以它可能包含错别字。我将在稍后测试并在必要时进行更正。
我发现oracle的TO_CHAR（日期，'Q'）功能对计算财务日历非常有用。下面的查询使用'with'子句来构建两件事
例：
with test_dates as (
select sysdate + level * 80 test_date from dual connect by level < 11
),
fiscal_map as (
select 1 cal, 2 fiscal from dual
union
select 2 cal, 3 fiscal from dual
union
select 3 cal, 4 fiscal from dual
union
select 4 cal, 1 fiscal from dual
)
select
test_date,
TO_CHAR(test_date, 'Q') cal_quarter,
fiscal_map.fiscal,
(case when CAL < fiscal then
TO_CHAR(test_date, 'yyyy') + 0
else TO_CHAR(test_date, 'yyyy') + 1
end) FISCAL_YEAR
from test_dates, fiscal_map
where fiscal_map.cal = TO_CHAR(test_date, 'Q')
order by test_date
输出：
TEST_DT CAL_Q FISCAL Q FISCAL_YR
22-Jul-10 3 4 2010
10-Oct-10 4 1 2011
29-Dec-10 4 1 2011
19-Mar-11 1 2 2011
07-Jun-11 2 3 2011
26-Aug-11 3 4 2011
14-Nov-11 4 1 2012
02-Feb-12 1 2 2012
22-Apr-12 2 3 2012
11-Jul-12 3 4 2012
select T.USERNAME,T.CREATED,
CASE WHEN EXTRACT (MONTH FROM T.CREATED)>=4 AND EXTRACT (MONTH FROM T.CREATED)<=12 THEN
TO_CHAR(EXTRACT (YEAR FROM T.CREATED))||'-'||TO_CHAR(EXTRACT (YEAR FROM T.CREATED)+1)
WHEN EXTRACT (MONTH FROM T.CREATED)<4 THEN
TO_CHAR(EXTRACT (YEAR FROM T.CREATED)-1)||'-'||TO_CHAR(EXTRACT (YEAR FROM T.CREATED)) ELSE NULL END FY
from sys.dba_users t WHERE T.USERNAME in ('101655','100149')
输出将是：
1 101655 14/01/2014 12:21:53 2013-2014
2 100149 05/05/2012 16:55:00 2012-2013