Oracle删除临时表

1.Oracle的临时表分为会话级临时表和事务级临时表
2.创建语法分别为
会话临时表：

CREATE GLOBAL Temporary TABLE TEMPTABLENAME
ON COMMIT PRESERVE ROWS
AS
SELECT .....FROM..

事务临时表：

CREATE GLOBAL Temporary TABLE TEMPTABLENAME
ON COMMIT DELETE ROWS
INSERT INTO TEMPTABLENAME VALUES('','',....)

3.删除临时表
会话临时表在使用TRUNCATE 或 会话结束后删除掉
事务临时表在COMMIT和ROLLBACK后自动删除
存在前面两个前提时，直接用DROP TABLE TEMPTABLENAME

4.提示会话在使用删除不了，则需要结束了会话才能DROP会话临时表

SELECT sid, serial# 
FROM v$session 
WHERE sid = (SELECT sid FROM v$lock 
WHERE id1 = (SELECT object_id  FROM dba_objects 
WHERE object_name = UPPER('TEMPTABLENAME3')));

ALTER system kill session '751,16962';

5.批量删除临时表

declare p_sql varchar(200);
begin
for r in (select a.OBJECT_NAME from ALL_OBJECTS a where a.OBJECT_NAME like 'TEMPTABLENAME%') loop
p_sql:='TRUNCATE TABLE '||r.OBJECT_NAME;
execute immediate p_sql;
p_sql:='drop table '||r.OBJECT_NAME;
execute immediate p_sql;
end loop;
end;