1Z1-071 REAL EXAM | 1Z1-071 ACTUAL DUMPS

1z1-071 Real Exam | 1z1-071 Actual Dumps

1z1-071 Real Exam | 1z1-071 Actual Dumps

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The 1z1-071 Exam covers a wide range of topics related to SQL, including basic SQL concepts, data retrieval using SQL, data manipulation using SQL, and database objects such as tables, views, and indexes. 1z1-071 exam also tests candidates' knowledge of SQL functions, subqueries, and regular expressions. Candidates are expected to have a good understanding of SQL syntax and be able to write complex SQL queries.

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Oracle Database SQL Sample Questions (Q297-Q302):

NEW QUESTION # 297
Which two are true about dropping columns from a table?

  • A. A primary key column cannot be dropped.
  • B. A column must be set as unused before it is dropped from a table.
  • C. A column that is referenced by another column in any other table cannot be dropped.
  • D. A column can be removed only if it contains no data.
  • E. Multiple columns can be dropped simultaneously using the ALTER TABLEcommand.
  • F. A column drop is implicitly committed.

Answer: A,E

Explanation:
Explanation/Reference: https://oracle-base.com/articles/8i/dropping-columns


NEW QUESTION # 298
Which three actions can you perform by using the ORACLE_DATAPUMP access driver?

  • A. Execute DML statements on an external table.
  • B. Create a directory object for an external table.
  • C. Read data from an external table and load it into a table in the database.
  • D. Query data from an external table.
  • E. Read data from a table in the database and insert it into an external table.
  • F. Create a directory object for a flat file.

Answer: C,E


NEW QUESTION # 299
Examine the commands used to create DEPARTMENT_DETAILSand COURSE_DETAILS tables:

You want to generate a list of all department IDs that do not exist in the COURSE_DETAILStable.
You execute the SQL statement:

What is the outcome?

  • A. It fails because the join type used is incorrect.
  • B. It executes successfully and displays the required list.
  • C. It executes successfully but displays an incorrect list.
  • D. It fails because the ON clause condition is not valid.

Answer: B


NEW QUESTION # 300
View the exhibits and examine the structures of the COSTSand PROMOTIONStables.


Evaluate the following SQL statement:

What would be the outcome of the above SQL statement?

  • A. It displays prod IDs in the promos with the highest cost in the same time interval.
  • B. It displays prod IDs in the promo with the lowest cost.
  • C. It displays prod IDs in the promos which cost less than the highest cost in the same time interval.
  • D. It displays prod IDs in the promos with the lowest cost in the same time interval.

Answer: C


NEW QUESTION # 301
Examine these statements and results:
SQL> SELECT COUNT(*) FROM emp
COUNT(*)
---------------------
14
sQL> CREATE GLOBAL TEMPORARY TABLE t emp As SELECT * FROM emp;
Table created
SQL> INSERT INTo temp SELECT * FROM emp;
14 rows created
SQL> COMMIT:
Commit complete*
SQL> INSERT INTo temp SELECT * EROM emp;
14. rows created
SQL> SELECT COUNT(*) FROM t emp
How many rows are retrieved by the last query?

  • A. 0
  • B. 1
  • C. 2
  • D. 3

Answer: B

Explanation:
Global temporary tables in Oracle Database are designed to hold temporary data for the duration of a session or a transaction.
Given that the global temporary table is created and then populated twice from the emp table without any mention of data deletion, one would initially think the count would be 28, since 14 rows are inserted twice. However, if the temporary table was created with the default ON COMMIT DELETE ROWS option, the rows are deleted at the end of the transaction, which is signified by the COMMIT operation.
Thus, after the first COMMIT, the temporary table would be empty. After the second INSERT, another 14 rows would be added. So, the last query would retrieve 14 rows unless a DELETE operation was committed.
Reference:
Oracle Documentation on Temporary Tables: https://docs.oracle.com/cd/B28359_01/server.111/b28310/tables003.htm#ADMIN11633 Please note that the actual number of rows retrieved by the last query could differ if there are any triggers, cascading deletes, or the table is defined differently than assumed in this context.


NEW QUESTION # 302
......

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