【第12題】【063題庫】2019年OCP12c認證1Z0-063考試題庫大全
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我要咨詢OCP 12c考試考3科,分別是071、062、063,之前071和062都已經做過解析,這里開始063題庫解析,希望對考063的同學有幫助,順利通過063考試。
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12題、Your multitenant container database (CDB) contains multiple pluggable databases (PDBs).
You execute the command to create a common user:
SQL> CREATE USER c##a_admin
IDENTIFIED BY password
DEFAULT TABLESPACE users
QUOTA 100M ON users
TEMPORARY TABLESPACE temp;
Which statement is true about the execution of the command?
A. The common user is created in the CDB and all the PDBs, and uses the users and temp tablespaces of the CDB to store schema objects.
B. The command succeeds only if all the PDBs have the users and temp tablespaces.
C. The command gives an error because the container=all clause is missing.
D. The command succeeds and sets the default permanent tablespace of a PDB as the default tablespace for the c##a_admin user if the users tabiespace does not exist in that PDB.
Answer: B
(經過實驗發現如果 pdb 是打開的,沒有對應的表空間,則創建用戶會失敗,而且不同 pdb 的公用用戶會使用 pdb 中對應的表空間,不會用 cdb 中對應的表空間,驗證方式:在 pdb 中用該用戶創建表,插入數據,查看 cdb_extents會看到該表所在的數據文件位置;如果 pdb 沒有打開,則不會在該 pdb 上創建公用用戶,只會在打開的 pdb 上創建公用用戶,這一點比較奇怪,一定要注意。)