oracle ±Ê¼Ç V Ö®´¥·¢Æ÷ (TRIGGER)
´¥·¢Æ÷ trigger
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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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CREATE OR REPLACE VIEW SM_V_UNIT_AUTH AS
SELECT T2.UNIT_ID,
T2.SUPER_UNIT_ID,
T1.AUTH_ID,
T1.AUTH_NAME,
T1.A ......
1.ASCII
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SQL> select ascii(’A’) A,ascii(’a’) a,ascii(’0’) zero,ascii(’ ’) space from dual;
A A ZERO SPACE
--------- --------- --------- ---------
65 97 48 32
2.CHR
¸ø³öÕ ......
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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¸ñʽ: CURSOR cursor_name [(partment[,parameter]...)] IS s ......
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