Oracle Certificate Profession 1Z0-053-09
(9)Which statement describes the information returned by the DBMS_SPACE.SPACE_USAGE procedure for LOB space usage?
A. It returns space usage of only BasicFile LOB chunks.
B. It returns space usage of only SecureFile LOB chunks.
C. It returns both BasicFile and SecureFile LOB space usage for only nonpartitioned tables.
D. It returns both BasicFile and SecureFile LOB space usage for both partitioned and nonpartitioned tables.
答案:(B)
解析:
參考DBMS_SPACE.SPACE_USAGE
這個過程的第一種過載形式可以顯示段的高水位線下資料塊的使用.
可以針對LOBs、LOB PARTITIONS、LOB SUBPARTITIONS來計算使用情況.
這個過程只能用於自動段空間管理的表空間.
點陣圖塊、段頭、擴充套件點陣圖塊不被該過程計算. 這種過載不能用於SECUREFILE LOBs.
第二種過載形式返回SECUREFILE LOB空間使用. 它返回在LOB段中被所有SECUREFILE LOBs使用的塊中空間的數量
沒有專門針對BASICFILE的
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