oracle ±Ê¼Ç V Ö®´¥·¢Æ÷ (TRIGGER)
´¥·¢Æ÷ trigger
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´´½¨Óï·¨:
create or replace trigger trigger_name
before |after
insert |delete | update |{[of column[,column ...]]
on [schema.]table_name
for each row
[when condition]
trigger_body;
eg(×ÐϸÌå»á):
create or replace trigger hello_tri
before insert or delete or update on emp
for each row
begin
dbms_output.put_line('ÎÒÊÇ´¥·¢Æ÷£¡');
end;
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This course is aim to train the great DBA with good English speaking.
In recent years, more demands of Oracle DBA, but most of Senior DBAs are required to speak good English.
English has become the great barrier for more peoples in their career development, you must have the deep feeling about it ......
1. flashback table table_test to timestamp to_timestamp('20091103000000','yyyymmddhh24miss');
2.Èç¹û報錯ORA-08189: cannot flashback the table because row movement is not enabled
3.alter table table_test enable row movement;
4.OK ......
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¡¡¡¡create table temp as select stuName,stuNo,stuSex from stuInfo where stuAge>25;
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¡¡¡¡create table stuInfo(
¡¡¡¡stuName varchar2(10) ,
¡¡¡¡stuNo varchar2(10),
¡¡¡¡stuSex varchar2(4),
¡¡¡¡stuAge number(2),
¡¡¡¡st ......