search
HomeDatabaseMysql TutorialOracle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:

linux

Statement
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
MySQL String Types: Storage, Performance, and Best PracticesMySQL String Types: Storage, Performance, and Best PracticesMay 10, 2025 am 12:02 AM

MySQLstringtypesimpactstorageandperformanceasfollows:1)CHARisfixed-length,alwaysusingthesamestoragespace,whichcanbefasterbutlessspace-efficient.2)VARCHARisvariable-length,morespace-efficientbutpotentiallyslower.3)TEXTisforlargetext,storedoutsiderows,

Understanding MySQL String Types: VARCHAR, TEXT, CHAR, and MoreUnderstanding MySQL String Types: VARCHAR, TEXT, CHAR, and MoreMay 10, 2025 am 12:02 AM

MySQLstringtypesincludeVARCHAR,TEXT,CHAR,ENUM,andSET.1)VARCHARisversatileforvariable-lengthstringsuptoaspecifiedlimit.2)TEXTisidealforlargetextstoragewithoutadefinedlength.3)CHARisfixed-length,suitableforconsistentdatalikecodes.4)ENUMenforcesdatainte

What are the String Data Types in MySQL?What are the String Data Types in MySQL?May 10, 2025 am 12:01 AM

MySQLoffersvariousstringdatatypes:1)CHARforfixed-lengthstrings,2)VARCHARforvariable-lengthtext,3)BINARYandVARBINARYforbinarydata,4)BLOBandTEXTforlargedata,and5)ENUMandSETforcontrolledinput.Eachtypehasspecificusesandperformancecharacteristics,sochoose

How to Grant Permissions to New MySQL UsersHow to Grant Permissions to New MySQL UsersMay 09, 2025 am 12:16 AM

TograntpermissionstonewMySQLusers,followthesesteps:1)AccessMySQLasauserwithsufficientprivileges,2)CreateanewuserwiththeCREATEUSERcommand,3)UsetheGRANTcommandtospecifypermissionslikeSELECT,INSERT,UPDATE,orALLPRIVILEGESonspecificdatabasesortables,and4)

How to Add Users in MySQL: A Step-by-Step GuideHow to Add Users in MySQL: A Step-by-Step GuideMay 09, 2025 am 12:14 AM

ToaddusersinMySQLeffectivelyandsecurely,followthesesteps:1)UsetheCREATEUSERstatementtoaddanewuser,specifyingthehostandastrongpassword.2)GrantnecessaryprivilegesusingtheGRANTstatement,adheringtotheprincipleofleastprivilege.3)Implementsecuritymeasuresl

MySQL: Adding a new user with complex permissionsMySQL: Adding a new user with complex permissionsMay 09, 2025 am 12:09 AM

ToaddanewuserwithcomplexpermissionsinMySQL,followthesesteps:1)CreatetheuserwithCREATEUSER'newuser'@'localhost'IDENTIFIEDBY'password';.2)Grantreadaccesstoalltablesin'mydatabase'withGRANTSELECTONmydatabase.TO'newuser'@'localhost';.3)Grantwriteaccessto'

MySQL: String Data Types and CollationsMySQL: String Data Types and CollationsMay 09, 2025 am 12:08 AM

The string data types in MySQL include CHAR, VARCHAR, BINARY, VARBINARY, BLOB, and TEXT. The collations determine the comparison and sorting of strings. 1.CHAR is suitable for fixed-length strings, VARCHAR is suitable for variable-length strings. 2.BINARY and VARBINARY are used for binary data, and BLOB and TEXT are used for large object data. 3. Sorting rules such as utf8mb4_unicode_ci ignores upper and lower case and is suitable for user names; utf8mb4_bin is case sensitive and is suitable for fields that require precise comparison.

MySQL: What length should I use for VARCHARs?MySQL: What length should I use for VARCHARs?May 09, 2025 am 12:06 AM

The best MySQLVARCHAR column length selection should be based on data analysis, consider future growth, evaluate performance impacts, and character set requirements. 1) Analyze the data to determine typical lengths; 2) Reserve future expansion space; 3) Pay attention to the impact of large lengths on performance; 4) Consider the impact of character sets on storage. Through these steps, the efficiency and scalability of the database can be optimized.

See all articles

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Tools

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

MantisBT

MantisBT

Mantis is an easy-to-deploy web-based defect tracking tool designed to aid in product defect tracking. It requires PHP, MySQL and a web server. Check out our demo and hosting services.

DVWA

DVWA

Damn Vulnerable Web App (DVWA) is a PHP/MySQL web application that is very vulnerable. Its main goals are to be an aid for security professionals to test their skills and tools in a legal environment, to help web developers better understand the process of securing web applications, and to help teachers/students teach/learn in a classroom environment Web application security. The goal of DVWA is to practice some of the most common web vulnerabilities through a simple and straightforward interface, with varying degrees of difficulty. Please note that this software

Atom editor mac version download

Atom editor mac version download

The most popular open source editor