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查看表空间相关命令

發布時間：2025/3/8 编程问答 32 豆豆
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默認表空間數據文件大小根據DATA BLOCKS的大小有關，默認最大為32GB
表空間達到32G，只能增加數據文件alter tablespace 表空間名 add datafile '數據文件路徑‘ size 500m autoextend on next 100m maxsize 10000M;
未達到32G，修改數據文件的擴展性alter database datafile '文件路徑' autoextend on next 100m maxsize 10000M;

查看表空間sql

select Upper(F.TABLESPACE_NAME) as"表空間名",D.TOT_GROOTTE_MB/1024 as "表空間大小(G)", D.TOT_GROOTTE_MB - F.TOTAL_BYTES "已使用空間(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 "空閑空間(M)",F.MAX_BYTES "最大塊(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) as TOT_GROOTTE_MB FROM SYS.DBA_DATA_FILES DD GROUP BY DD.TABLESPACE_NAME ) DWHERE D.TABLESPACE_NAME = F.TABLESPACE_NAME ORDER BY 1 select * from ( Select a.tablespace_name, to_char(a.bytes/1024/1024,'99,999.999') total_bytes, to_char(b.bytes/1024/1024,'99,999.999') free_bytes, to_char(a.bytes/1024/1024 - b.bytes/1024/1024,'99,999.999') use_bytes, to_char((1 - b.bytes/a.bytes)*100,'99.99') || '%' use from (select tablespace_name, sum(bytes) bytes from dba_data_files group by tablespace_name) a, (select tablespace_name, sum(bytes) bytes from dba_free_space group by tablespace_name) b where a.tablespace_name = b.tablespace_name union all select c.tablespace_name, to_char(c.bytes/1024/1024,'99,999.999') total_bytes, to_char( (c.bytes-d.bytes_used)/1024/1024,'99,999.999') free_bytes, to_char(d.bytes_used/1024/1024,'99,999.999') use_bytes, to_char(d.bytes_used*100/c.bytes,'99.99') || '%' use from (select tablespace_name,sum(bytes) bytes from dba_temp_files group by tablespace_name) c, (select tablespace_name,sum(bytes_cached) bytes_used from v$temp_extent_pool group by tablespace_name) d where c.tablespace_name = d.tablespace_name ）

查看表空間剩余大小

select sum(bytes/1024/1024) sizeMB from dba_free_space z where z.tablespace_name='SGCC990001_INDEX'

查看數據表行數

SELECT ?num_rows, blocks, empty_blocks as empty,
avg_space, chain_cnt, avg_row_len, owner, table_name
FROM ?dba_tables where num_rows is not null order by num_rows desc;

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