oracle 存储过程入门
1、创建存储过程
create or replace procedure test(var_name_1 in type,var_name_2 out type) as
--声明变量(变量名 变量类型)
begin
--存储过程的执行体
end test;
2、变量赋值
变量名 := 值;
E.g：
create or replace procedure test(workDate in Date) is
x number(4,2);
begin
x := 1;
end test;
3、判断语句:
if 比较式 then begin end; end if;
E.g
create or replace procedure test(x in number) is
begin
if x >0 then
begin
x := 0 - x;
end;
end if;
if x = 0 then
begin
x: = 1;
end;
end if;
end test;
4、For 循环
For ... in ... LOOP
--执行语句
end LOOP;
(1)循环遍历游标
create or replace procedure test() as
Cursor cursor is select name from student; name varchar(20);
begin
for name in cursor LOOP
begin
dbms_output.putline(name);
end;
end LOOP;
end test;
第一次写oracle存储过程，在此记录，以当查看，代码如下：
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create or replace procedure p_data_send is
Cursor sendList is
SELECT e.state, s.privilege, s.timeOut,e.equipId ,s.sendInterval FROM t_equip e, t_data_send s
WHERE e.equipId=s.equipId AND s.prevId=0 AND s.state=1 AND s.timeOut< sysdate;
v_equipState t_equip.state%type;
v_privilege t_data_send.privilege%type;
v_timeOut t_data_send.timeout%type;
v_equipId t_equip.equipid%type;
v_sendInterval t_data_send.sendinterval%type;
i number;
begin
open sendList;
for i in (select count(1) from t_equip e, t_data_send s WHERE e.equipId=s.equipId AND s.prevId=0 AND s.state=1 AND s.timeOut< sysdate) loop
begin
fetch sendList into v_equipState,
v_privilege,
v_timeOut,
v_equipId,
v_sendInterval;
if v_equipState = 0 then
UPDATE t_data_send s SET s.state=0,s.privilege=(v_privilege+20),
s.timeout=sysdate+ v_sendInterval/24/60/60 WHERE s.equipid=v_equipId;
else
DELETE FROM t_data_send s WHERE s.equipid=v_equipId;
end if;
Dbms_Output.put_line(v_equipId);
commit;
exit when sendList%notfound;
if sendList%isopen then
close sendList;
end if;
end;
end loop;
end p_data_send;
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create or replace procedure p_online is
v_intervalVale number;
v_equipmentIDValue varchar2(16);
i number;
totalNum number;
Cursor onlineList is
select (ROUND(TO_NUMBER(sysdate - e.updateTime) * 24 * 60 * 60)-1800),e.equipId from t_equip e;
begin
select count(1) into totalNum from t_equip;
open onlineList;
for i in 1..totalNum loop
begin
fetch onlineList into v_intervalVale,v_equipmentIDValue;
if v_intervalVale<0 then
update t_equip e SET e.st_online = '1' where e.equipId = v_equipmentIDValue;
else
update t_equip e SET e.st_online = '0' where e.equipId = v_equipmentIDValue;
end if;
commit;
exit when onlineList%notfound;
end;
end loop;
close onlineList;
end p_online;
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