查看临时表空间使用情况,如何扩展表空间

SELECT D.TABLESPACE_NAME,SPACE "SUM_SPACE(M)",BLOCKS SUM_BLOCKS,

USED_SPACE "USED_SPACE(M)",ROUND(NVL(USED_SPACE,0)/SPACE*100,2) "USED_RATE(%)",

NVL(FREE_SPACE,0) "FREE_SPACE(M)"

FROM

(SELECT TABLESPACE_NAME,ROUND(SUM(BYTES)/(1024*1024),2) SPACE,SUM(BLOCKS) BLOCKS

FROM DBA_TEMP_FILES

GROUP BY TABLESPACE_NAME) D,

(SELECT TABLESPACE_NAME,ROUND(SUM(BYTES_USED)/(1024*1024),2) USED_SPACE,

ROUND(SUM(BYTES_FREE)/(1024*1024),2) FREE_SPACE

FROM V$TEMP_SPACE_HEADER

GROUP BY TABLESPACE_NAME) F

WHERE D.TABLESPACE_NAME = F.TABLESPACE_NAME(+)

当通过ORACLE中的create table ... as select 语句创建一张新表时，新表的数据量为比较大，如10亿，这时SQL*Plus很可能就会提示“ORA-01653: ...”错误信息。这个错误信息暗示表空间大小不够，需要为表空间增加数据文件。

分析：

1. 查询表空间剩余字节大小

SELECT TABLESPACE_NAME, SUM(BYTES)/1024/1024 AS "FREE SPACE(M)"

FROM DBA_FREE_SPACE

WHERE TABLESPACE_NAME = '&tablespace_name'

GROUP BY TABLESPACE_NAME;

注：如果是临时表空间，请查询DBA_TEMP_FREE_SPACE

SELECT TABLESPACE_NAME, FREE_SPACE/1024/1024 AS "FREE SPACE(M)"

FROM DBA_TEMP_FREE_SPACE

WHERE TABLESPACE_NAME = '&tablespace_name';

2. 如果不知道表空间数据文件目录规划，可以先查询出表空间所有数据文件

SELECT TABLESPACE_NAME, FILE_ID, FILE_NAME, BYTES/1024/1024 AS "BYTES(M)"

FROM DBA_DATA_FILES

WHERE TABLESPACE_NAME = '&tablespace_name';

注：如果是临时表空间，请查询DBA_TEMP_FILES

SELECT TABLESPACE_NAME, FILE_ID, FILE_NAME, BYTES/1024/1024 AS "SPACE(M)"

FROM DBA_TEMP_FILES

WHERE TABLESPACE_NAME = '&tablespace_name';

3. 为空间不足的表空间增加数据文件

ALTER TABLESPACE &tablespace_name ADD DATAFILE '&datafile_name' SIZE 2G;

注：如果要为临时表空间扩容，使用下面的语句

ALTER TABLESPACE &tablespace_name ADD TEMPFILE '&datafile_name' SIZE 2G;