orcle linux怎么登陆？全局表空间统计信息怎么查看？表空间内表的统计信息怎么看？数据表的字段怎么查？

TBS_STAT表空间统计信息

https://blog.csdn.net/u013991521/article/details/79293706

SELECT a.tablespace_name ,
total / (1024 * 1024 * 1024) total,
free / (1024 * 1024 * 1024) free,
(total - free) / (1024 * 1024 * 1024) used,
round((total - free) / total, 4) * 100 usage_rate
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;

https://blog.csdn.net/wwlhz/article/details/73296430

登录
```
su - oracle

sqlplus / as sysdba
```

查表的字段

SELECT column_name, data_type
FROM all_tab_cols
WHERE table_name = 'DBA_DATA_FILES' ;

增加表空间

https://blog.csdn.net/naruto0025/article/details/78622374

表空间内表统计信息

https://blog.csdn.net/sayyy/article/details/80006939?utm_source=blogxgwz6

SELECT SEGMENT_NAME,
SUM(BYTES) / 1024 / 1024 / 1024,
OWNER,
TABLESPACE_NAME
FROM DBA_SEGMENTS
WHERE TABLESPACE_NAME = 'TBS_GL_RES'
GROUP BY SEGMENT_NAME;

https://www.cnblogs.com/BobXie85/p/9814686.html