How to view table space in oracle

How to check the table space in oracle: 1. Check the name and size of the table space through the "SELECT t.tablespace_name, round(SUM(bytes / (1024 * 1024)), 0) ts_size..." command ;2. Use the "SELECT tablespace_name, file_id, file_name, round(...)..." command to view the name and size of the physical file in the table space.

The operating environment of this tutorial: Windows 7 system, Oracle 11g version, Dell G3 computer.

How to view table space in oracle?

Oracle View table space and size

--1. View the name and size of the table space

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. View The name and size of the table space physical file

SELECT tablespace_name, 
file_id, 
file_name, 
round(bytes / (1024 * 1024), 0) total_space 
FROM dba_data_files 
ORDER BY tablespace_name;

--3. View the name and size of the rollback segment

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. View the control file

SELECT NAME FROM v$controlfile;

--5 , Check the log file

SELECT MEMBER FROM v$logfile;

--6. Check the usage of the table space

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. Check the database object

SELECT owner, object_type, status, COUNT(*) count# 
FROM all_objects 
GROUP BY owner, object_type, status;

--8. Check the database Version

SELECT version 
FROM product_component_version 
WHERE substr(product, 1, 6) = 'Oracle';

--9. View the creation date and archiving method of the database

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

Recommended study: "oracle video tutorial"

The above is the detailed content of How to view table space in oracle. For more information, please follow other related articles on the PHP Chinese website!