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 ...
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 ...
Examine this statement: SELECT1 AS id,‘ John’ AS first_name, NULL AS commission FROM dual INTERSECT SELECT 1,’John’ null FROM dual ORDER BY 3; What is returned upon execution? A) 2 rows B) 0 rows ...
Which three actions can you perform by using the ALTER TABLE command? A) Drop pseudo columns from a table. B) Restrict all DML statements on a table. C) Drop all columns simultaneously from a table. ...
An Oracle database server session has an uncommitted transaction in progress which updated 5000 rows in a table. In which three situations does the transact ion complete thereby committing the updates ...