要查看表空間的使用率,可以通過以下步驟在Oracle數(shù)據(jù)庫中執(zhí)行:
登錄到Oracle數(shù)據(jù)庫管理工具,如SQL*Plus或SQL Developer。
運行以下查詢語句來查看所有表空間的使用情況:
SELECT tablespace_name,
total_space_mb,
used_space_mb,
free_space_mb,
ROUND(used_space_percent, 2) AS used_space_percent
FROM (
SELECT tablespace_name,
ROUND(SUM(bytes) / 1024 / 1024, 2) AS total_space_mb,
ROUND(SUM(bytes - NVL(free_space, 0)) / 1024 / 1024, 2) AS used_space_mb,
ROUND(NVL(free_space, 0) / 1024 / 1024, 2) AS free_space_mb,
ROUND((SUM(bytes - NVL(free_space, 0)) / SUM(bytes)) * 100, 2) AS used_space_percent
FROM (
SELECT tablespace_name,
SUM(bytes) AS bytes
FROM dba_data_files
GROUP BY tablespace_name
) a
LEFT JOIN (
SELECT tablespace_name,
SUM(bytes) AS free_space
FROM dba_free_space
GROUP BY tablespace_name
) b ON a.tablespace_name = b.tablespace_name
GROUP BY tablespace_name, bytes
);
這條查詢語句會返回所有表空間的名稱、總空間、已使用空間、剩余空間和使用率。
請注意,以上查詢語句需要有DBA權限才能執(zhí)行,如果你沒有DBA權限,請聯(lián)系數(shù)據(jù)庫管理員來查看表空間的使用率。