Oracle 11G OCP 1Z0-053 429
（429）Which of the following supplied functions is used to identify external tables,directories,and BFILES?
A. DBMS_TDB.CHECK_DIRECTORIES
B. DBMS_TDB.CHECK_EXTERNAL
C. DBMS_TDB.CHECK_BFILE
D. DBMS_TDB.CHECK_EXT
答案：（B）
解析：
（DBMS_TDB中一共就2個儲存函式：CHECK_DB和CHECK_EXTERNAL）
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