多选题Which two partitioned table maintenance operations support asynchronous Global Index Maintenance inOracle database 12c?（）AALTER TABLE SPLIT PARTITIONBALTER TABLE MERGE PARTITIONCALTER TABLE TRUNCATE PARTITIONDALTER TABLE ADD PARTITIONEALTER TABLE DROP PARTITIONFALTER TABLE MOVE PARTITION
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单选题You enabled Flashback Data Archive on the INVENTORY table. Which DDL operation is supported on the table after enabling Flashback Data Archive？（）ADrop the table.BPartition the table.CTruncate the table.DAdd a column to the table.ERename a column in the table.
多选题Which two operations can be performed on an external table（）ACreate a view on the table.BCreate an index on the table.CCreate a synonym on the table.DAdd a virtual column to the table.EUpdate the table using the UPDATE statement.FDelete rows in the table using the DELETE command.
多选题Which two operations can be performed on an external table（）ACreate a view on the table.BCreate an index on the table.CCreate a synonym on the table.DAdd a virtual column to the table.EUpdate the table using the UPDATE statement.FDelete rows in the table using the DELETE command
单选题Which syntax turns an existing constraint on?（）A ALTER TABLE table_name ENABLE constraint_name;B ALTER TABLE table_name STATUS = ENABLE CONSTRAINT constraint_name;C ALTER TABLE table_name ENABLE CONSTRAINT constraint_name;D ALTER TABLE table_name STATUS ENABLE CONSTRAINT constraint_name;E ALTER TABLE table_name TURN ON CONSTRAINT constraint_name;
单选题It is very important for the strong man to know that whatever strong he is, he cannot be the strongest.A ItB forC to knowD whatever strong
单选题在HTML中，（）是强调文本标记。A ＜EM>B ＜STRONG>＜/STRONG＞C ＜UNDERLINE>＜/UNDERLINE＞D ＜STRONGS>＜/STRONGS＞
