execute immediate ' create global temporary table temp ( id int,name varchar(30)) on commit preserve rows;'on commit preserve rows; --提交保留数据 会话临时表
on commit delete rows; --提交删除数据 事务临时表
on commit delete rows; --提交删除数据 事务临时表
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)
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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 <TABLE_NAME> (<column specification> )
ON COMMIT PRESERVE ROWS; 2。事务特有的临时表
CREATE GLOBAL TEMPORARY <TABLE_NAME> (<column specification> )
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 说明临时表是事务指定,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。
as
str varchar2(100);
begin
str:='CREATE GLOBAL TEMPORARY TABLE TABLENAME (
COL1 VARCHAR2(10),
COL2 NUMBER
) ON COMMIT PRESERVE ROWS' ;
execute immediate str;
end;
/
as
str varchar2(100);
beginstr:=‘CREATE GLOBAL TEMPORARY TABLE admin_work_area
(startdate DATE,
enddate DATE,
class CHAR(20))
ON COMMIT DELETE ROWS’;
execute immediate str;
end;
/