ORACLE表空间操作基础命令
一、创建临时表空间
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create temporary tablespace USER_TEMP tempfile '/Project/DB/USER_TEMP.DBF' size 200m autoextend on next 100m maxsize 20480m extent management local; |
二、创建表空间
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create tablespace USER DATAFILE '/Project/DB/USER.DBF' size 200m autoextend on next 100m maxsize 20480m extent management local; |
三、扩展表空间
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alter tablespace USER add datafile '/u01/app/oracle/oradata/USER02.DBF' size 200m autoextend on next 100m maxsize 20480m; |
四、扩展临时表空间
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alter tablespace USER add tempfile '/u01/app/oracle/oradata/orcl/USER.DBF' size 200m REUSE autoextend on next 100m maxsize 20480m; |
五、查看表空间的名字及文件所在位置
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select tablespace_name, file_id, file_name, round(bytes / (1024 * 1024), 0) total_space from sys.dba_data_files order by tablespace_name |
六、查看临时表空间的名字及文件所在位置
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select tablespace_name, file_id, file_name, round(bytes / (1024 * 1024), 0) total_space from sys.dba_TEMP_files order by tablespace_name |
七、查询表空间信息
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select username,default_tablespace,t.* from dba_users t |
八、查询当前表空间下使用情况
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select a.tablespace_name, a.bytes / 1024 / 1024 "sum MB", (a.bytes - b.bytes) / 1024 / 1024 "used MB", b.bytes / 1024 / 1024 "free MB", round(((a.bytes - b.bytes) / a.bytes) * 100, 2) "used%" from (select tablespace_name, sum(bytes) bytes from dba_data_files group by tablespace_name) a, (select tablespace_name, sum(bytes) bytes, max(bytes) largest from dba_free_space group by tablespace_name) b where a.tablespace_name = b.tablespace_name order by ((a.bytes - b.bytes) / a.bytes) desc; |
九、查看临时表空间
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SELECT D.TABLESPACE_NAME,SPACE "SUM_SPACE(M)",BLOCKS SUM_BLOCKS, USED_SPACE "USED_SPACE(M)",ROUND(NVL(USED_SPACE,0)/SPACE*100,2) "USED_RATE(%)", NVL(FREE_SPACE,0) "FREE_SPACE(M)" FROM (SELECT TABLESPACE_NAME,ROUND(SUM(BYTES)/(1024*1024),2) SPACE,SUM(BLOCKS) BLOCKS FROM DBA_TEMP_FILES GROUP BY TABLESPACE_NAME) D, (SELECT TABLESPACE_NAME,ROUND(SUM(BYTES_USED)/(1024*1024),2) USED_SPACE, ROUND(SUM(BYTES_FREE)/(1024*1024),2) FREE_SPACE FROM V$TEMP_SPACE_HEADER GROUP BY TABLESPACE_NAME) F WHERE D.TABLESPACE_NAME = F.TABLESPACE_NAME(+); |
十、删除临时表空间多余的数据文件
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alter database tempfile '/u01/app/oracle/oradata/orcl/TSBX_DATA/TSBX_TEMP02.DBF' offline; alter database tempfile '/u01/app/oracle/oradata/orcl/TSBX_DATA/TSBX_TEMP02.DBF' drop; |
二〇二〇年六月二十三日 16:25:49
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作者：龙魂
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