查看Oracle表空间使用情况与增大表空间

1，查看表空间使用情况

SELECT D.TABLESPACE_NAME,
SPACE || 'M' "SUM_SPACE(M)",
BLOCKS "SUM_BLOCKS",
SPACE - NVL (FREE_SPACE, 0) || 'M' "USED_SPACE(M)",
ROUND ( (1 - NVL (FREE_SPACE, 0) / SPACE) * 100, 2) || '%'
"USED_RATE(%)",
FREE_SPACE || 'M' "FREE_SPACE(M)"
FROM ( SELECT TABLESPACE_NAME,
ROUND (SUM (BYTES) / (1024 * 1024), 2) SPACE,
SUM (BLOCKS) BLOCKS
FROM DBA_DATA_FILES
GROUP BY TABLESPACE_NAME) D,
( SELECT TABLESPACE_NAME,
ROUND (SUM (BYTES) / (1024 * 1024), 2) FREE_SPACE
FROM DBA_FREE_SPACE
GROUP BY TABLESPACE_NAME) F
WHERE D.TABLESPACE_NAME = F.TABLESPACE_NAME(+)
UNION ALL --如果有临时表空间
SELECT D.TABLESPACE_NAME,
SPACE || 'M' "SUM_SPACE(M)",
BLOCKS SUM_BLOCKS,
USED_SPACE || 'M' "USED_SPACE(M)",
ROUND (NVL (USED_SPACE, 0) / SPACE * 100, 2) || '%' "USED_RATE(%)",
NVL (FREE_SPACE, 0) || 'M' "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(+)
ORDER BY 1;

2，增大表空间

增加表空间大小的四种方法
Meathod1：给表空间增加数据文件
ALTER TABLESPACE app_data ADD DATAFILE
'D:ORACLEPRODUCT10.2.0ORADATAEDWTESTAPP03.DBF' SIZE 50M;

Meathod2：新增数据文件，并且允许数据文件自动增长
ALTER TABLESPACE app_data ADD DATAFILE
'D:ORACLEPRODUCT10.2.0ORADATAEDWTESTAPP04.DBF' SIZE 50M
AUTOEXTEND ON NEXT 5M MAXSIZE 100M;

Meathod3：允许已存在的数据文件自动增长
ALTER DATABASE DATAFILE 'D:ORACLEPRODUCT10.2.0ORADATAEDWTESTAPP03.DBF'
AUTOEXTEND ON NEXT 5M MAXSIZE 100M;

Meathod4：手工改变已存在数据文件的大小
ALTER DATABASE DATAFILE 'D:ORACLEPRODUCT10.2.0ORADATAEDWTESTAPP02.DBF'
RESIZE 100M;