爲了使該代碼需要一年的輸入並打印出基於過去這些年來,您需要更改基於年數活動切換到年-積累。
我會在下面添加一些示例。
第一個將修改您的原始代碼以允許切換n_numb
。
第二個將重構使用procedure
s來簡化事情。
對於第一個示例,我將從您的原始代碼開始,並添加一個accumulator
V_YEAR_ACCUMULATION
來衡量年份。然後將n_numb
更改爲不同的值將得到不同的輸出。
DECLARE
V_TEST VARCHAR2(80) := 'BORN';
N_NUMB NUMBER := 1990;
V_YEAR_ACCUMULATION NUMBER := 0;
BEGIN
WHILE V_TEST <> 'Birthday'
LOOP
IF V_YEAR_ACCUMULATION = 1
THEN V_TEST := 'Birthday';
END IF;
DBMS_OUTPUT.put_line(V_TEST || ': ' || N_NUMB);
N_NUMB := N_NUMB + 1;
V_YEAR_ACCUMULATION := V_YEAR_ACCUMULATION + 1;
END LOOP;
V_TEST := 'Playschool';
WHILE V_YEAR_ACCUMULATION < 4 AND V_TEST = 'Playschool' LOOP
DBMS_OUTPUT.put_line(V_TEST || ': ' || N_NUMB);
N_NUMB := N_NUMB + 1;
V_YEAR_ACCUMULATION := V_YEAR_ACCUMULATION + 1;
END LOOP;
V_TEST := 'Regularschool';
WHILE V_YEAR_ACCUMULATION < 17 AND V_TEST = 'Regularschool' LOOP
DBMS_OUTPUT.put_line(V_TEST || ': ' || N_NUMB);
N_NUMB := N_NUMB + 1;
V_YEAR_ACCUMULATION := V_YEAR_ACCUMULATION + 1;
END LOOP;
V_TEST := 'Engineering';
WHILE V_YEAR_ACCUMULATION < 21 AND V_TEST = 'Engineering' LOOP
DBMS_OUTPUT.put_line(V_TEST || ': ' || N_NUMB);
N_NUMB := N_NUMB + 1;
V_YEAR_ACCUMULATION := V_YEAR_ACCUMULATION + 1;
END LOOP;
V_TEST := 'SearchingJob';
WHILE V_YEAR_ACCUMULATION < 23 AND V_TEST = 'SearchingJob' LOOP
DBMS_OUTPUT.put_line(V_TEST || ': ' || N_NUMB);
N_NUMB := N_NUMB + 1;
V_YEAR_ACCUMULATION := V_YEAR_ACCUMULATION + 1;
END LOOP;
V_TEST := 'Working';
WHILE V_YEAR_ACCUMULATION < 24 AND V_TEST = 'Working' LOOP
DBMS_OUTPUT.put_line(V_TEST || ': ' || N_NUMB);
N_NUMB := N_NUMB + 1;
V_YEAR_ACCUMULATION := V_YEAR_ACCUMULATION + 1;
END LOOP;
END;
/
並對其進行測試:
使用n_numb := 1990
給出:
BORN: 1990
Birthday: 1991
Playschool: 1992
Playschool: 1993
Regularschool: 1994
...
...
SearchingJob: 2012
Working: 2013
但n_numb := 1899
,您可以:
BORN: 1899
Birthday: 1900
Playschool: 1901
Playschool: 1902
Regularschool: 1903
但是,有一些重構,可以簡化事情。
在第二個示例中,我將創建用於執行打印的過程,並隨着時間的推移從一個活動移動到下一個活動。這將需要更少的代碼。
首先,創建一個過程來print
當前activity
和進步的years
:
CREATE OR REPLACE PROCEDURE GROW_OLDER(P_ACTIVITY IN VARCHAR2, P_YEARS_TO_CONTINUE IN NUMBER, P_YEARS_ACCUMULATED IN OUT NUMBER)
IS
V_LOCAL_ACCUMULATION NUMBER := 0;
BEGIN
WHILE V_LOCAL_ACCUMULATION < P_YEARS_TO_CONTINUE LOOP
DBMS_OUTPUT.put_line(UTL_LMS.FORMAT_MESSAGE('%s: %s',P_ACTIVITY,TO_CHAR(P_YEARS_ACCUMULATED + V_LOCAL_ACCUMULATION)));
V_LOCAL_ACCUMULATION := V_LOCAL_ACCUMULATION + 1;
END LOOP;
P_YEARS_ACCUMULATED := P_YEARS_ACCUMULATED + P_YEARS_TO_CONTINUE;
END;
/
然後創建一個過程來划過來從活動的運動協調的活動:
CREATE OR REPLACE PROCEDURE MOVE_THROUGH_THE_YEARS(P_START_YEAR IN NUMBER)
IS
V_YEAR_ACCUMULATION NUMBER := P_START_YEAR;
BEGIN
GROW_OLDER('Born', 1, V_YEAR_ACCUMULATION);
GROW_OLDER('Birthday', 1, V_YEAR_ACCUMULATION);
GROW_OLDER('Playschool', 2, V_YEAR_ACCUMULATION);
GROW_OLDER('Regularschool', 13, V_YEAR_ACCUMULATION);
GROW_OLDER('Engineering', 4, V_YEAR_ACCUMULATION);
GROW_OLDER('SearchingJob', 2, V_YEAR_ACCUMULATION);
GROW_OLDER('Working', 1, V_YEAR_ACCUMULATION);
END;
/
然後測試它。開始1990
:
BEGIN
MOVE_THROUGH_THE_YEARS(1990);
END;
/
Born: 1990
Birthday: 1991
Playschool: 1992
Playschool: 1993
Regularschool: 1994
Regularschool: 1995
...
...
Engineering: 2010
SearchingJob: 2011
SearchingJob: 2012
Working: 2013
或者2077
:
BEGIN
MOVE_THROUGH_THE_YEARS(2077);
END;
/
Born: 2077
Birthday: 2078
Playschool: 2079
Playschool: 2080
Regularschool: 2081
Regularschool: 2082
...
...
Engineering: 2097
SearchingJob: 2098
SearchingJob: 2099
Working: 2100
編輯如果你只是想一次打印每個活動,您可以用不無循環的替代取代上述過程。
CREATE OR REPLACE PROCEDURE GROW_OLDER(P_ACTIVITY IN VARCHAR2, P_YEARS_TO_CONTINUE IN NUMBER, P_YEARS_ACCUMULATED IN OUT NUMBER)
IS
BEGIN
DBMS_OUTPUT.put_line(UTL_LMS.FORMAT_MESSAGE('%s: %s',P_ACTIVITY,TO_CHAR(P_YEARS_ACCUMULATED)));
P_YEARS_ACCUMULATED := P_YEARS_ACCUMULATED + P_YEARS_TO_CONTINUE;
END;
/
CREATE OR REPLACE PROCEDURE MOVE_THROUGH_THE_YEARS(P_START_YEAR IN NUMBER)
IS
V_YEAR_ACCUMULATION NUMBER := P_START_YEAR;
BEGIN
GROW_OLDER('Born', 1, V_YEAR_ACCUMULATION);
GROW_OLDER('Birthday', 1, V_YEAR_ACCUMULATION);
GROW_OLDER('Playschool', 2, V_YEAR_ACCUMULATION);
GROW_OLDER('Regularschool', 13, V_YEAR_ACCUMULATION);
GROW_OLDER('Engineering', 4, V_YEAR_ACCUMULATION);
GROW_OLDER('SearchingJob', 2, V_YEAR_ACCUMULATION);
GROW_OLDER('Working', 1, V_YEAR_ACCUMULATION);
END;
/
然後對其進行測試:
BEGIN
MOVE_THROUGH_THE_YEARS(1990);
END;
/
結果:
Born: 1990
Birthday: 1991
Playschool: 1992
Regularschool: 1994
Engineering: 2007
SearchingJob: 2011
Working: 2013
編輯如果你需要每個活動一行的匿名塊,這裏有一個例子:
DECLARE
V_YEARS NUMBER := 1990;
BEGIN
DBMS_OUTPUT.put_line(UTL_LMS.FORMAT_MESSAGE('Born: '||TO_CHAR(V_YEARS)));
V_YEARS := V_YEARS + 1;
DBMS_OUTPUT.put_line(UTL_LMS.FORMAT_MESSAGE('Birthday: '||TO_CHAR(V_YEARS)));
V_YEARS := V_YEARS + 1;
DBMS_OUTPUT.put_line(UTL_LMS.FORMAT_MESSAGE('Playschool: '||TO_CHAR(V_YEARS)));
V_YEARS := V_YEARS + 2;
DBMS_OUTPUT.put_line(UTL_LMS.FORMAT_MESSAGE('Regularschool: '||TO_CHAR(V_YEARS)));
V_YEARS := V_YEARS + 13;
DBMS_OUTPUT.put_line(UTL_LMS.FORMAT_MESSAGE('Engineering: '||TO_CHAR(V_YEARS)));
V_YEARS := V_YEARS + 4;
DBMS_OUTPUT.put_line(UTL_LMS.FORMAT_MESSAGE('SearchingJob: '||TO_CHAR(V_YEARS)));
V_YEARS := V_YEARS + 2;
DBMS_OUTPUT.put_line(UTL_LMS.FORMAT_MESSAGE('Working: '||TO_CHAR(V_YEARS)));
V_YEARS := V_YEARS + 1;
END;
/
輸出與所有其他示例相同:
Born: 1990
Birthday: 1991
Playschool: 1992
Regularschool: 1994
Engineering: 2007
SearchingJob: 2011
Working: 2013
您可以創建過程並將年份作爲參數傳遞。 – Nitish
目前它不工作,我們改變了一年,首先我們需要修復代碼中的錯誤。 –
代碼中的錯誤是什麼? – Nitish