Oracle刪除臨時表

1.Oracle的臨時表分為會話級臨時表和事務級臨時表
2.創建語法分別為
會話臨時表：

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

事務臨時表：

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

3.刪除臨時表
會話臨時表在使用TRUNCATE 或 會話結束后刪除掉
事務臨時表在COMMIT和ROLLBACK后自動刪除
存在前面兩個前提時，直接用DROP TABLE TEMPTABLENAME

4.提示會話在使用刪除不了，則需要結束了會話才能DROP會話臨時表

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.批量刪除臨時表

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;