ORACLE的基本語法集錦

2021-09-22 12:10:32 字數 2401 閱讀 1090

-- 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)

asbegin

enddd;

-- 函式

create or replace function ee(v_id in employee%rowtype) return varchar(15)

isvar_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

endcreate 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

endcreate 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...