Which two are true about creating tables in an Oracle database? A.A create table statement can specify the maximum number of rows the table will contain. B.The same table name can be used for tables i ...

No user-defined locks are used in your database. Which three are true about Transaction Control Language (TCL)? A.COMMIT erases all the transaction^ savepoints and releases its locks. B.COMMIT ends th ...

Which three are true about subqueries? A.A subquery can be used in a WHERE clause. B.A subquery can be used in a HAVING clause. C.=ANY can only evaluate the argument against a subcjuery if it returns ...

Examine the description of the sales table. The sales table has 55,000 rows. Examine this statements: Which two statements are true? A) SALES1 has PRIMARY KEY and UNIQUE constraints on any selected co ...

case语句 格式 case 变量 in val1 ) action1 ;; val2 ) action2 ;; val3 ) action3 ;; .... * ) action_other ;; esac 注意 1.常规的break是在每一项后面加 ;; 2.无条件继续 ...

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Which three conditions must be met before you Virtual Private Catalog (VPC) can be created and used by an Administrator? A. A base recovery catalog must exist.B. The owner of the VPC cannot own recove ...

You use RMAN with a recovery catalog to back up your database. The backups and the archived redo log files are backed up to media daily. Because of a media failure, the entire database along with the ...