1, the basic grammar
CREATE OR REPLACE PROCEDURE 存储过程名(param1 in type,param2 out type)
/** AS和IS没区别 **/
IS
变量1 类型(值范围);
变量2 类型(值范围);
BEGIN
select count(*) into 变量1 from 表名 where 列名=param1;
if (判断条件) then
select 列名 into 变量2 from 表名 where 列名=param1;
DBMS_OUTPUT.put_line('打印信息');
Elseif (判断条件) then
dbms_output.put_line('打印信息');
Else
Raise 异常名 (NO_DATA_FOUND);
End if;
Exception
When others then
Rollback;
END;
2, the basic use
2.1, no parameters of the process
create or replace procedure test_count
is
v_total int;
v_date varchar(20);
begin
select count(*) into v_total from dual;
select to_char(sysdate,'yyyy-mm-dd') into v_date from dual;
DBMS_OUTPUT.put_line('总人数：'||v_total);
DBMS_OUTPUT.put_line('当前时间:'||v_date);
end;
Call the method
begin
test_count;
end;
2.2, with only process the incoming parameters
create or replace procedure test_count1(v_id in varchar2)
as
v_name varchar(100);
begin
select c_name into v_name from tb_store where c_stono=v_id;
DBMS_OUTPUT.put_line(v_id||'店的名称为:'||v_name);
exception
when no_data_found then dbms_output.put_line('no_data_found');
end;
Call the method
begin
test_count1(11910);
end;
2.3, only the process output parameters
create or replace procedure test_count2(v_name out varchar2)
is
begin
select c_name into v_name from tb_store where c_stono='1101';
exception
when no_data_found then dbms_output.put_line('no_data_found');
end;
Call the method
declare
v_name varchar(200);
begin
test_count2(v_name);
dbms_output.put_line(v_name);
end;
2.4, with input and output parameters of the stored procedure
create or replace procedure test_count3(v_id in int,v_name out varchar2)
as
begin
select c_name into v_name from tb_store where c_stono=v_id;
dbms_output.put_line(v_name);
exception
when no_data_found then dbms_output.put_line('no_data_found');
end;
Call the method
declare
v_name varchar(200);
begin
test_count3('1101',v_name);
end;
