为了使该代码需要一年的输入并打印出基于过去这些年来,您需要更改基于年数活动切换到年-积累。
我会在下面添加一些示例。
第一个将修改您的原始代码以允许切换n_numb
。
第二个将重构使用procedure
s来简化事情。
对于第一个示例,我将从您的原始代码开始,并添加一个accumulator
V_YEAR_ACCUMULATION
来衡量年份。然后将n_numb
更改为不同的值将得到不同的输出。
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;
/
并对其进行测试:
使用n_numb := 1990
给出:
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,有一些重构,可以简化事情。
在第二个示例中,我将创建用于执行打印的过程,并随着时间的推移从一个活动移动到下一个活动。这将需要更少的代码。
首先,创建一个过程来print
当前activity
和进步的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;
/
然后创建一个过程来划过来从活动的运动协调的活动:
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;
/
然后测试它。开始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
编辑如果你只是想一次打印每个活动,您可以用不无循环的替代取代上述过程。
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;
/
然后对其进行测试:
BEGIN
MOVE_THROUGH_THE_YEARS(1990);
END;
/
结果:
Born: 1990
Birthday: 1991
Playschool: 1992
Regularschool: 1994
Engineering: 2007
SearchingJob: 2011
Working: 2013
编辑如果你需要每个活动一行的匿名块,这里有一个例子:
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;
/
输出与所有其他示例相同:
Born: 1990
Birthday: 1991
Playschool: 1992
Regularschool: 1994
Engineering: 2007
SearchingJob: 2011
Working: 2013
您可以创建过程并将年份作为参数传递。 – Nitish
目前它不工作,我们改变了一年,首先我们需要修复代码中的错误。 –
代码中的错误是什么? – Nitish