oracle_存储过程例子_1

Posted 2020-09-04 sujingnuli

--关于游标 if,for 的例子
create or replace procedure peace_if
is
cursor var_c is select * from grade;
begin
for temp in var_c loop
if temp.course_name=‘OS‘ then
dbms_output.put_line(‘Stu_name=‘||temp.stu_name);
else if temp.course_name=‘DB‘ then
dbms_output.put_line(‘DB‘);
else
dbms_output.put_line(‘fengla fengla‘);
end if;
end loop;
end;
--关于游标，for,case得例子
create or replace procedure peace_case1
is
cursor var_c is select * from test_case;
begin
for temp in var_c loop
case temp.vol
when 1 then
dbms_output.put_line(‘haha1‘);
when 2 then
dbms_output.put_line(‘haha2‘);
when 3 then
dbms_output.put_line(‘haha3‘);
when 4 then
dbms_output.put_line(‘haha4‘);
when 5 then
dbms_output.put_line(‘haha5‘);
else
dbms_output.put_line(‘haha‘);
end case;
end loop;
end;

--关于游标 for,case,的例子2
create or replace procedure peace_case2
is
cursor var_c is select * from test_case;
begin
for temp in var_c loop
case
when temp.vol=1 then
dbms_output.put_line(‘haha1‘);
when temp.vol=2 then
dbms_output.put_line(‘haha2‘);
when temp.vol=3 then
dbms_output.put_line(‘haha3‘);
when temp.vol=4 then
dbms_output.put_line(‘haha4‘);
else
dbms_output.put_line(‘haha5‘);
end case;
end loop;
end;
--关于for 循环的例子
--to_char();实现其他数据类型向字符类型转换
create or replace procedure peace_for
is
sum1 number :=0;
temp varchar2(500);
begin
for i in 1..9 loop
temp :=‘‘;
for j in 1..i loop
sum1 :=i*j;
temp:=temp||‘ ‘||to_char(i)||‘*‘||to_char(j)||‘=‘||to_char(sum1)||‘‘;
end loop;
dbms_output.put_line(temp);
end loop;
end;

--关于loop循环
create or replace procedure loop_cur
is
stu_name varchar2(100);
course_name varchar2(100);
cursor var_c is select * from grade;
begin
open var_c;
loop
fetch var_c into stu_name,course_name;
exit when var_c%notfound;
dbms_output.put_line(stu_name||‘ ‘|| course_name);
end loop;
close var_c;
end;
--关于异常处理的例子
create or replace procedure peace_exp(in1 in varchar2)
is
c_n varchar2(100);
begin
select course_name into c_n from grade where stu_name=in1;
dbms_output.put_line(c_n);
exception
when no_data_found
then
dbms_output.put_line(‘try‘);
when TOO_MANY_ROWS
then
dbms_output.put_line(‘more‘);
end;

--异常处理例子2
create or replace procedure peace_insert(c_n in varchar2)
is
error EXCEPTION;
begin
if c_n =‘OK‘ then
insert into grade(course_name) values(c_n);
elsif c_n=‘NG‘ then
insert into grade(course_name) values(c_n);
raise error;
else
dbms_output.put_line(‘c_n‘||‘ ‘||c_n);
end if;
commit;
exception
when error then
rollback;
dbms_output.put_line(‘error‘);
end;

--定义包头
create or replace package peace_pkg
as
function test1(in1 in varchar2)
return number;
procedure test2(in2 in varchar2);
end peace_pkg;
--定义包体
create or replace package body peace_pkg
as
function test1(in1 in varchar2)
return number
as
temp number;
begin
temp:=0;
return temp;
end;
procedure test2(in2 in varchar2)
is
begin
dbms_output.put_line(in2);
end;
end peace_pkg;