1 --1G=1024MB
2 --1M=1024KB
3 --1K=1024Bytes
4 --1M=11048576Bytes
5 --1G=1024*11048576Bytes=11313741824Bytes
6 SELECT a.tablespace_name "表空间名",
7 total "表空间大小",
8 free "表空间剩余大小",
9 (total - free) "表空间使用大小",
10 total / (1024 * 1024 * 1024) "表空间大小(G)",
11 free / (1024 * 1024 * 1024) "表空间剩余大小(G)",
12 (total - free) / (1024 * 1024 * 1024) "表空间使用大小(G)",
13 round((total - free) / total, 4) * 100 "使用率 %"
14 FROM (SELECT tablespace_name, SUM(bytes) free
15 FROM dba_free_space
16 GROUP BY tablespace_name) a,
17 (SELECT tablespace_name, SUM(bytes) total
18 FROM dba_data_files
19 GROUP BY tablespace_name) b
20 WHERE a.tablespace_name = b.tablespace_name
