1:定義procedure(在高級程序設計語言中的模塊的概念)
create or replace procedure procedure_name (param_1 in type,param_2 in out type)
as
param_inner type
begin
statement;
end;
a:不含參數的procedure
create or replace procedure temp
as
temp_salary employee.salary%type;
begin
select salary into temp_salary from employee where employee.empid=13;
dbms_output.put_line('temp_salary='||temp_salary);
end;
----調用procedure--
begin
temp;
end;output:
tempemployee=2440
d:含參數的procedure
create or replace procedure temp2 (
temp_empid in employee.empid%type,
temp_empname in out employee.empname%type
)as
name1 employee.empname%type;
begin
select empname into name1 from employee where employee.empid=temp_empid;
temp_empname:='姓名'||name1;
end;
declare
iid employee.empid%type;
iname employee.empid%type;
begin
iid:=10;
iname:='daniel';
temp2(iid,iname);
dbms_output.put_line('iid='||iid);
dbms_output.put_line('iname='||iname);
end;
output:
iid=10
iname=姓名dwj分析：
在調用procedure temp2()的時候iname:='daniel'被存儲過程的結果覆蓋，變成iname=姓名dwj;
實際上不用再begin裏面聲明也可以；
帶param的procedure 中in out的意思 in typein要輸入的param out output要打出的param;
c:How to use procedure to create table
create or replace procedure create_table
as sq varchar2(2000);
begin
sq:='create table t2t(
t_id varchar2(20) primary key,
t_name varchar2(255) not null,
t_gender varchar2(255)
)';
execute immediate sq;
end;
begin
create_table;
end;
select * from t2t;分析：
在create or replace procedure，play attention to limits of authority,有時候創建的procedure不能被調用
即：systemdba中創建的不能在systemnormal中使用；否則會報錯