查看oracle表空间使用情况，并且给空间不足的表文件进行扩容

查看表空间信息

语句一：

SELECT DBF.TABLESPACE_NAME "表空间名称",
DBF.FILE_NAME "表空间文件",
DBF.TOTALSPACE "总量(M)",
DBF.TOTALBLOCKS AS 总块数,
DFS.FREESPACE "剩余总量(M)",
DFS.FREEBLOCKS "剩余块数",
(DFS.FREESPACE / DBF.TOTALSPACE) * 100 "空闲比例"
FROM (SELECT T.TABLESPACE_NAME,
SUM(T.BYTES) / 1024 / 1024 TOTALSPACE,
SUM(T.BLOCKS) TOTALBLOCKS,
FILE_NAME
FROM DBA_DATA_FILES T
GROUP BY T.TABLESPACE_NAME,FILE_NAME) DBF,
(SELECT TT.TABLESPACE_NAME,
SUM(TT.BYTES) / 1024 / 1024 FREESPACE,
SUM(TT.BLOCKS) FREEBLOCKS
FROM DBA_FREE_SPACE TT
GROUP BY TT.TABLESPACE_NAME) DFS
WHERE TRIM(DBF.TABLESPACE_NAME) = TRIM(DFS.TABLESPACE_NAME)

语句二：

SELECT A.TABLESPACE_NAME "表空间名",
B.FILE_NAME as "表空间文件",
TOTAL / 1024 / 1024 || 'MB' 表空间大小,
FREE / 1024 / 1024 || 'MB' 表空间剩余大小,
(TOTAL - FREE) / 1024 / 1024 || 'MB' 表空间使用大小,
ROUND((TOTAL - FREE) / TOTAL, 4) * 100 "使用率 %"
FROM (SELECT TABLESPACE_NAME, SUM(BYTES) FREE
FROM DBA_FREE_SPACE
GROUP BY TABLESPACE_NAME) A,
(SELECT TABLESPACE_NAME, SUM(BYTES) TOTAL, FILE_NAME
FROM DBA_DATA_FILES
GROUP BY TABLESPACE_NAME, FILE_NAME) B
WHERE A.TABLESPACE_NAME = B.TABLESPACE_NAME
order by ROUND((TOTAL - FREE) / TOTAL, 4) * 100 DESC;

更改表空间文件大小的语句：

ALTER DATABASE DATAFILE 'D:/WEBGISDB/HISTORY.ORA' RESIZE 5000M;

注：扩容的时候一定要写文件的路径，不然会提示无法找到文件