Oracle中创建和删除临时表
CREATE GLOBAL TEMPORARY TABLE TABLENAME ( COL1 VARCHAR2(10), COL2 NUMBER ) ON COMMIT PRESERVE(DELETE) ROWS ; --O
CREATE GLOBAL TEMPORARY TABLE TABLENAME (
COL1 VARCHAR2(10),
COL2 NUMBER
) ON COMMIT PRESERVE(DELETE) ROWS ;
--ON COMMIT DELETE ROWS 说明临时表是事务指定,每次提交后Oracle将截断表(删除全部行)
---------------------------------------
在Oracle8i中,可以创建以下两种临时表:
1。会话特有的临时表
CREATE GLOBAL TEMPORARY
ON COMMIT PRESERVE ROWS;
2。事务特有的临时表
CREATE GLOBAL TEMPORARY
ON COMMIT DELETE ROWS;
CREATE GLOBAL TEMPORARY TABLE MyTempTable
所建的临时表虽然是存在的,但是你试一下insert 一条记录然后用别的连接登上去select,记录是空的,明白了吧。
下面两句话再贴一下:
--ON COMMIT DELETE ROWS 说明临敀?表是事务指定,每次提交后ORACLE将截断表(删除全部行)
--ON COMMIT PRESERVE ROWS 说明临时表是会话指定,当中断会话时ORACLE将截断表。
procedure 执行一系列的操作
package 可以在其中定义一些量、函数、过程等;
存储过程里不能直接使用DDL语句,,所以只能使用动态SQL语句来执行
create procedure pro
as
str varchar2(100);
begin
str := 'CREATE GLOBAL TEMPORARY TABLE admin_work_area
(startdate DATE,
enddate DATE,
class CHAR(20))
ON COMMIT DELETE ROWS’;
execute immediate str;
end;
删除:
truncate table MyTempTable
drop table MyTempTable
ORA-22992: 无法使用从远程表选择的 LOB 定位器
解决办法:
可以先创建一个临时表,然后把远程有LOB字段的表克隆到临时表中,然后再进行链接操作
1.本地创建临时表
Sql代码
create global temporary table photo_temp as select * from photo@photo_link where 1=2 ;
2.用database link导入远程数据到临时表
Sql代码
insert into photo_temp select * from photo@photo_link;--不要commit;否则临时表中数据消失
3.把临时表数据插入到永久表中:
Sql代码
insert into photo select * from photo_temp;
commit;
实例:
create global temporary table pic_temp as select * from WH_REGISTERPIC@ogdpshdb where 1=2 ;
insert into pic_temp select * from WH_REGISTERPIC@ogdpshdb;
insert into WH_REGISTERPIC select * from pic_temp;
commit;
删除临时表:
truncate table pic_temp ;
drop table pic_temp ;
解决普通用户在存储过程中无权建临时表问题:
在包头中加 AUTHID CURRENT_USER
例子:
create or replace package WH_Info_Output AUTHID CURRENT_USER is
-- Author :
-- Created : 2014年9月2日 15:27:25
-- Purpose :
--删除原有数据导入全部数据
procedure SP_WH_Info_Output_All(Fid in number default 1);
-- Public type declarations
--传入参数默认0:导入没有的数据 1:删除原有数据导入全部数据
procedure SP_WH_Info_Output(Fid in number default 0);
--导入WH_REGISTERPIC表(含有BLOG字段) 0:导入没有的数据 1:删除原有数据导入全部数据
procedure SP_WH_PIC_BLOGInfo_Output(Fid in number default 0);
end WH_Info_Output;
--导入WH_REGISTERPIC表(含有BLOG字段) 0:导入没有的数据 1:删除原有数据导入全部数据
procedure SP_WH_PIC_BLOGInfo_Output(Fid in number default 0)
is
str varchar2(300);
begin
if Fid = 0 then
str:='create global temporary table pic_temp as select * from WH_REGISTERPIC@ogdpshdb where 1=2';
execute immediate str;
str:='insert into pic_temp select * from WH_REGISTERPIC@ogdpshdb w where (w.WELLID, w.PICTYPECODE, w.VERSIONNO, w.PICFILENAME) not in (select WELLID, PICTYPECODE, VERSIONNO, PICFILENAME from WH_REGISTERPIC)';
execute immediate str; ----使用动态SQL语句来执行
str:='insert into WH_REGISTERPIC select * from pic_temp';
execute immediate str;
end if;
end SP_WH_PIC_BLOGInfo_Output;
在CentOS 6.4下安装Oracle 11gR2(x64)
Oracle 11gR2 在VMWare虚拟机中安装步骤
Debian 下 安装 Oracle 11g XE R2
本文永久更新链接地址:

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