当用户给您类似2019/02/03的日期时，我的函数应返回类似以下的日期： 2019/02 / 03、2019 / 02 / 02、2019 / 02 / 01、2019 / 01 / 31、2019 / 12 / 31、2019 / 11 / 31、2019 / 09 / 30、2019 / 06/30 ，2019/03 / 31，2018 / 12/31
我的这个函数有一个编译错误，我不确定是什么。
CREATE OR REPLACE FUNCTION rep_datesTest(pdt_ref_date IN DATE)
RETURN SYS_REFCURSOR IS
pcr_result SYS_REFCURSOR;
BEGIN
OPEN pcr_result FOR
SELECT
trunc(pdt_ref_date) as pdt_ref_date,
trunc(pdt_ref_date) - 1 pdt_ref_date_1,
trunc(pdt_ref_date) - 2 pdt_ref_date_2,
trunc(pdt_ref_date) - 3 pdt_ref_date_3,
add_months(Last_DAY(trunc(trunc(pdt_ref_date) - 3, 'MM')), -1) first_day_of_last_month,
add_months(Last_DAY(trunc(trunc(pdt_ref_date) - 3, 'MM')), -2) first_day_of_2nd_last_month,
add_months(Last_DAY(trunc(trunc(pdt_ref_date) - 3, 'MM')), -3) first_day_of_3nd_last_month,
add_months(Last_DAY(Case when EXTRACT(MONTH from first_day_of_3nd_last_month)>9 and EXTRACT(MONTH from first_day_of_3nd_last_month)<=12
then to_date(EXTRACT(YEAR FROm first_day_of_3nd_last_month)||'-09-30','yyyy-mm-dd')
when EXTRACT(MONTH from first_day_of_3nd_last_month)<=9 and EXTRACT(MONTH from first_day_of_3nd_last_month)>6
then to_date(EXTRACT(YEAR FROm first_day_of_3nd_last_month)||'-06-30','yyyy-mm-dd')
when EXTRACT(MONTH from first_day_of_3nd_last_month)<=6 and EXTRACT(MONTH from first_day_of_3nd_last_month)>3
then to_date(EXTRACT(YEAR FROm first_day_of_3nd_last_month)||'-03-31','yyyy-mm-dd')
when EXTRACT(MONTH from first_day_of_3nd_last_month)<=3 and EXTRACT(MONTH from first_day_of_3nd_last_month)>12
then to_date(EXTRACT(YEAR FROm first_day_of_3nd_last_month)||'-12-31','yyyy-mm-dd') END
)) first_day_of_last_quarter_1,
add_months(Last_DAY(trunc(first_day_of_last_quarter_1, 'Q')), -8) first_day_of_last_quarter_2,
add_months(Last_DAY(trunc(first_day_of_last_quarter_1, 'Q')), -11) first_day_of_last_quarter_3,
add_months(Last_DAY(trunc(first_day_of_last_quarter_1, 'Q')), -14) first_day_of_last_quarter_4,
add_months(Last_DAY(trunc(first_day_of_last_quarter_1, 'Q')), -17) first_day_of_last_quarter_5
FROM dual;
RETURN pcr_result;
END;
答案 0 :(得分：1)
我相信你想要
SELECT trunc(pdt_ref_date) - 0 AS pdt_ref_date,
trunc(pdt_ref_date) - 1 AS pdt_ref_date_1,
trunc(pdt_ref_date) - 2 AS pdt_ref_date_2,
trunc(pdt_ref_date) - 3 AS pdt_ref_date_3,
add_months(trunc(pdt_ref_date, 'MM'), -0)-1 AS first_day_of_last_month,
add_months(trunc(pdt_ref_date, 'MM'), -1)-1 AS first_day_of_2nd_last_month,
add_months(trunc(pdt_ref_date, 'MM'), -2)-1 AS first_day_of_3nd_last_month,
add_months(trunc(pdt_ref_date, 'Q'), -0)-1 AS first_day_of_last_quarter_1,
add_months(trunc(pdt_ref_date, 'Q'), -3)-1 AS first_day_of_last_quarter_2,
add_months(trunc(pdt_ref_date, 'Q'), -6)-1 AS first_day_of_last_quarter_3,
add_months(trunc(pdt_ref_date, 'Q'), -9)-1 AS first_day_of_last_quarter_4,
add_months(trunc(pdt_ref_date, 'Q'), -12)-1 AS first_day_of_last_quarter_5
FROM dual;
PDT_REF_DATE | PDT_REF_DATE_1 | PDT_REF_DATE_2 | PDT_REF_DATE_3 | FIRST_DAY_OF_LAST_MONTH | FIRST_DAY_OF_2ND_LAST_MONTH | FIRST_DAY_OF_3ND_LAST_MONTH | FIRST_DAY_OF_LAST_QUARTER_1 | FIRST_DAY_OF_LAST_QUARTER_2 | FIRST_DAY_OF_LAST_QUARTER_3 | FIRST_DAY_OF_LAST_QUARTER_4 | FIRST_DAY_OF_LAST_QUARTER_5 :----------- | :------------- | :------------- | :------------- | :---------------------- | :-------------------------- | :-------------------------- | :-------------------------- | :-------------------------- | :-------------------------- | :-------------------------- | :-------------------------- 03-FEB-19 | 02-FEB-19 | 01-FEB-19 | 31-JAN-19 | 31-JAN-19 | 31-DEC-18 | 30-NOV-18 | 31-DEC-18 | 30-SEP-18 | 30-JUN-18 | 31-MAR-18 | 31-DEC-17
db <>提琴here
答案 1 :(得分：0)
以下是使用记录的解决方案（基于MT0的SQL答案）：
CREATE OR REPLACE PACKAGE your_package
AS
TYPE date_info_rec IS RECORD (pdt_ref_date DATE,
pdt_ref_date_1 DATE,
pdt_ref_date_2 DATE,
pdt_ref_date_3 DATE,
first_day_of_last_month DATE,
first_day_of_2nd_last_month DATE,
first_day_of_3rd_last_month DATE,
first_day_of_last_quarter_1 DATE,
first_day_of_last_quarter_2 DATE,
first_day_of_last_quarter_3 DATE,
first_day_of_last_quarter_4 DATE,
first_day_of_last_quarter_5 DATE);
FUNCTION your_function (in_date IN DATE)
RETURN date_info_rec;
END your_package;
/
CREATE OR REPLACE PACKAGE BODY your_package
AS
FUNCTION your_function (in_date IN DATE)
RETURN date_info_rec
IS
v_date_rec date_info_rec;
BEGIN
v_date_rec.pdt_ref_date := trunc(in_date);
v_date_rec.pdt_ref_date_1 := trunc(in_date) - 1;
v_date_rec.pdt_ref_date_2 := trunc(in_date) - 2;
v_date_rec.pdt_ref_date_3 := trunc(in_date) - 3;
v_date_rec.first_day_of_last_month := trunc(in_date, 'MM') - 1;
v_date_rec.first_day_of_2nd_last_month := add_months(trunc(in_date, 'MM'), -0) - 1;
v_date_rec.first_day_of_3rd_last_month := add_months(trunc(in_date, 'MM'), -0) - 1;
v_date_rec.first_day_of_last_quarter_1 := trunc(in_date, 'Q') - 1;
v_date_rec.first_day_of_last_quarter_2 := add_months(trunc(in_date, 'Q'), -3) - 1;
v_date_rec.first_day_of_last_quarter_3 := add_months(trunc(in_date, 'Q'), -6) - 1;
v_date_rec.first_day_of_last_quarter_4 := add_months(trunc(in_date, 'Q'), -9) - 1;
v_date_rec.first_day_of_last_quarter_5 := add_months(trunc(in_date, 'Q'), -12) - 1;
RETURN v_date_rec;
END;
END your_package;
/
如何调用函数的示例：
DECLARE
v_date DATE;
v_pop_date_rec your_package.date_info_rec;
BEGIN
v_date := SYSDATE;
v_pop_date_rec := your_package.your_function(in_date => v_date);
-- Demonstrate the output
dbms_output.put_line('v_pop_date_rec.pdt_ref_date = '||to_char(v_pop_date_rec.pdt_ref_date, 'dd/mm/yyyy'));
dbms_output.put_line('v_pop_date_rec.pdt_ref_date_1 = '||to_char(v_pop_date_rec.pdt_ref_date_1, 'dd/mm/yyyy'));
dbms_output.put_line('v_pop_date_rec.pdt_ref_date_2 = '||to_char(v_pop_date_rec.pdt_ref_date_2, 'dd/mm/yyyy'));
dbms_output.put_line('v_pop_date_rec.pdt_ref_date_3 = '||to_char(v_pop_date_rec.pdt_ref_date_3, 'dd/mm/yyyy'));
dbms_output.put_line('v_pop_date_rec.first_day_of_last_month = '||to_char(v_pop_date_rec.first_day_of_last_month, 'dd/mm/yyyy'));
dbms_output.put_line('v_pop_date_rec.first_day_of_2nd_last_month = '||to_char(v_pop_date_rec.first_day_of_2nd_last_month, 'dd/mm/yyyy'));
dbms_output.put_line('v_pop_date_rec.first_day_of_3rd_last_month = '||to_char(v_pop_date_rec.first_day_of_3rd_last_month, 'dd/mm/yyyy'));
dbms_output.put_line('v_pop_date_rec.first_day_of_last_quarter_1 = '||to_char(v_pop_date_rec.first_day_of_last_quarter_1, 'dd/mm/yyyy'));
dbms_output.put_line('v_pop_date_rec.first_day_of_last_quarter_2 = '||to_char(v_pop_date_rec.first_day_of_last_quarter_2, 'dd/mm/yyyy'));
dbms_output.put_line('v_pop_date_rec.first_day_of_last_quarter_3 = '||to_char(v_pop_date_rec.first_day_of_last_quarter_3, 'dd/mm/yyyy'));
dbms_output.put_line('v_pop_date_rec.first_day_of_last_quarter_4 = '||to_char(v_pop_date_rec.first_day_of_last_quarter_4, 'dd/mm/yyyy'));
dbms_output.put_line('v_pop_date_rec.first_day_of_last_quarter_5 = '||to_char(v_pop_date_rec.first_day_of_last_quarter_5, 'dd/mm/yyyy'));
END;
/
v_pop_date_rec.pdt_ref_date = 22/02/2019
v_pop_date_rec.pdt_ref_date_1 = 21/02/2019
v_pop_date_rec.pdt_ref_date_2 = 20/02/2019
v_pop_date_rec.pdt_ref_date_3 = 19/02/2019
v_pop_date_rec.first_day_of_last_month = 31/01/2019
v_pop_date_rec.first_day_of_2nd_last_month = 31/01/2019
v_pop_date_rec.first_day_of_3rd_last_month = 31/01/2019
v_pop_date_rec.first_day_of_last_quarter_1 = 31/12/2018
v_pop_date_rec.first_day_of_last_quarter_2 = 30/09/2018
v_pop_date_rec.first_day_of_last_quarter_3 = 30/06/2018
v_pop_date_rec.first_day_of_last_quarter_4 = 31/03/2018
v_pop_date_rec.first_day_of_last_quarter_5 = 31/12/2017