ORACLE的基本語法集錦

-- 表 
create table test (names varchar2(12), 
dates date, 
num int, 
dou double); 
-- 檢視 
create or replace view vi_test as 
select * from test; 
-- 同義詞 
create or replace synonym aa 
for dbusrcard001.aa; 
-- 儲存過程 
create or replace produce dd(v_id in employee.empoy_id%type) 
as begin 
end 
dd; 
-- 函式 
create or replace function ee(v_id in employee%rowtype) return varchar(15) 
is var_test varchar2(15); 
begin 
return var_test; 
exception when others then 
end 
-- 三種觸發器的定義 
create or replace trigger ff 
alter delete 
on test 
for each row 
declare 
begin 
delete from test; 
if sql%rowcount < 0 or sql%rowcount is null then 
rais_replaction_err(-20004,"錯誤") 
end if 
end 
create or replace trigger gg 
alter insert 
on test 
for each row 
declare 
begin 
if ：old.names = :new.names then 
raise_replaction_err(-2003,"編碼重複"); 
end if 
end 
create or replace trigger hh 
for update 
on test 
for each row 
declare 
begin 
if updating then 
if:old.names <> :new.names then 
reaise_replaction_err(-2002,"關鍵字不能修改") 
end if 
end if 
end 
-- 定義游標 
declare 
cursor aa is 
select names,num from test; 
begin 
for bb in aa 
loop 
if bb.names = "oracle" then 
end if 
end loop; 
end 
-- 速度優化，前一語句不後一語句的速度快幾十倍 
select names,dates 
from test,b 
where test.names = b.names(+) and 
b.names is null and 
b.dates > date('2003-01-01','yyyy-mm-dd') 
select names,dates 
from test 
where names not in ( select names 
from b 
where dates > to_date('2003-01-01','yyyy-mm-dd')) 
-- 查詢重覆記錄 
select names,num 
from test 
where rowid != (select max(rowid) 
from test b 
where b.names = test.names and 
b.num = test.num) 
-- 查詢表test中時間最新的前10條記錄 
select * from (select * from test order by dates desc) where rownum < 11 
-- 序列號的產生 
create sequence row_id 
minvalue 1 
maxvalue 9999999999999999999999 
start with 1 
increment by 1 
insert into test values(row_id.nextval,....) 

ORACLE的基本語法集錦

oracle的基本語法集錦 表 create table test names varchar2 12 dates date,num int,dou double 檢視 create or replace view vi test as select from test 同義詞 create or ...

ORACLE的基本語法集錦

表 create table test names varchar2 12 dates date,num int,dou double 檢視 create or replace view vi test as select from test 同義詞 create or replace synony...

ORACLE的基本語法集錦

表 create table test names varchar2 12 dates date,num int,dou double 檢視 create or replace view vi test as select from test 同義詞 create or replace synony...