查看表空间及使用情况

1、查看表空间的名称及大小 

SELECT t.tablespace_name, round(SUM(bytes / (1024 * 1024)), 0) ts_size 

FROM dba_tablespaces t, dba_data_files d 

WHERE t.tablespace_name = d.tablespace_name 

GROUP BY t.tablespace_name; 

 

2、查看表空间物理文件的名称及大小 

SELECT tablespace_name, 

file_id, 

file_name, 

round(bytes / (1024 * 1024), 0) total_space 

FROM dba_data_files 

ORDER BY tablespace_name; 

 

3、查看回滚段名称及大小 

SELECT segment_name, 

tablespace_name, 

r.status, 

(initial_extent / 1024) initialextent, 

(next_extent / 1024) nextextent, 

max_extents, 

v.curext curextent 

FROM dba_rollback_segs r, v$rollstat v 

WHERE r.segment_id = v.usn(+) 

ORDER BY segment_name; 

 

4、查看控制文件 

SELECT NAME FROM v$controlfile; 

 

5、查看日志文件 

SELECT MEMBER FROM v$logfile; 

 

6、查看表空间的使用情况 

SELECT SUM(bytes) / (1024 * 1024) AS free_space, tablespace_name 

FROM dba_free_space 

GROUP BY tablespace_name; 

SELECT a.tablespace_name, 

a.bytes total, 

b.bytes used, 

c.bytes free, 

(b.bytes * 100) / a.bytes "% USED ", 

(c.bytes * 100) / a.bytes "% FREE " 

FROM sys.sm$ts_avail a, sys.sm$ts_used b, sys.sm$ts_free c 

WHERE a.tablespace_name = b.tablespace_name 

AND a.tablespace_name = c.tablespace_name; 

 

7、查看数据库库对象 

SELECT owner, object_type, status, COUNT(*) count# 

FROM all_objects 

GROUP BY owner, object_type, status; 

 

8、查看数据库的版本　 

SELECT version 

FROM product_component_version 

WHERE substr(product, 1, 6) = 'Oracle'; 

 

9、查看数据库的创建日期和归档方式 

SELECT created, log_mode, log_mode FROM v$database; 

--1G=1024MB 

--1M=1024KB 

--1K=1024Bytes 

--1M=11048576Bytes 

--1G=1024*11048576Bytes=11313741824Bytes 

SELECT a.tablespace_name "表空间名", 

total "表空间大小", 

free "表空间剩余大小", 

(total - free) "表空间使用大小", 

total / (1024 * 1024 * 1024) "表空间大小(G)", 

free / (1024 * 1024 * 1024) "表空间剩余大小(G)", 

(total - free) / (1024 * 1024 * 1024) "表空间使用大小(G)", 

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 

FROM dba_data_files 

GROUP BY tablespace_name) b 

WHERE a.tablespace_name = b.tablespace_name 

 

 

10、查询表空间使用情况

SELECT Upper(F.TABLESPACE_NAME)         "表空间名",

       D.TOT_GROOTTE_MB                 "表空间大小(M)",

       D.TOT_GROOTTE_MB - F.TOTAL_BYTES "已使用空间(M)",

       To_char(Round(( D.TOT_GROOTTE_MB - F.TOTAL_BYTES ) / D.TOT_GROOTTE_MB * 100, 2), '990.99')

       || '%'                           "使用比",

       F.TOTAL_BYTES                    "空闲空间(M)",

       F.MAX_BYTES                      "最大块(M)"

FROM   (SELECT TABLESPACE_NAME,

               Round(Sum(BYTES) / ( 1024 * 1024 ), 2) TOTAL_BYTES,

               Round(Max(BYTES) / ( 1024 * 1024 ), 2) MAX_BYTES

        FROM   SYS.DBA_FREE_SPACE

        GROUP  BY TABLESPACE_NAME) F,

       (SELECT DD.TABLESPACE_NAME,

               Round(Sum(DD.BYTES) / ( 1024 * 1024 ), 2) TOT_GROOTTE_MB

        FROM   SYS.DBA_DATA_FILES DD

        GROUP  BY DD.TABLESPACE_NAME) D

WHERE  D.TABLESPACE_NAME = F.TABLESPACE_NAME

ORDER  BY 1

--查询表空间的free space

select tablespace_name, count(*) AS extends,round(sum(bytes) / 1024 / 1024, 2) AS MB,sum(blocks) AS blocks from dba_free_space group BY tablespace_name;

--查询表空间的总容量

select tablespace_name, sum(bytes) / 1024 / 1024 as MB from dba_data_files group by tablespace_name;

--查询表空间使用率

SELECT total.tablespace_name,

       Round(total.MB, 2)           AS Total_MB,

       Round(total.MB - free.MB, 2) AS Used_MB,

       Round(( 1 - free.MB / total.MB ) * 100, 2)

       || '%'                       AS Used_Pct

FROM   (SELECT tablespace_name,

               Sum(bytes) / 1024 / 1024 AS MB

        FROM   dba_free_space

        GROUP  BY tablespace_name) free,

       (SELECT tablespace_name,

               Sum(bytes) / 1024 / 1024 AS MB

        FROM   dba_data_files

        GROUP  BY tablespace_name) total

WHERE  free.tablespace_name = total.tablespace_name;