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100% 1z0-071 Accuracy | 1z0-071 Exam Torrent

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100% 1z0-071 Accuracy | 1z0-071 Exam Torrent

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Oracle 1z1-071 (Oracle Database SQL) Exam is designed for professionals who want to show their skills and knowledge in SQL. 1z0-071 Exam measures a candidate's ability to design, manage, and manipulate the Oracle database system's SQL language. Passing 1z0-071 exam is a prerequisite for many Oracle certification programs.
Oracle Database SQL Sample Questions (Q172-Q177):NEW QUESTION # 172
Which three actions can you perform by using the ALTER TABLE command?
  • A. Drop all columns simultaneously from a table.
  • B. Enable or disable constraints on a table.
  • C. Restrict all DML statements on a table.
  • D. Rename a table
  • E. Drop pseudo columns from a table.
  • F. Lock a set of rows in a table CE Rename a table.
Answer: B,D,F

NEW QUESTION # 173
Examine the structure of the BOOKS_TRANSACTIONS table:
NameNull?Type
------------------------------------------------------------
TRANSACTION_IDNOT NULLVARCHAR2 (6)
BORROWED_DATEVARCHAR2 (50)
DUE_DATEDATE
BOOK_IDDATE
MEMBER_IDVARCHAR2 (6)
You want to display the member IDs, due date, and late fee as $2 for all transactions.
Which SQL statement must you execute?
  • A. SELECT member_id 'MEMBER ID', due_date 'DUE DATE', '$2 AS LATE FEE' FROM BOOKS_TRANSACTIONS;
  • B. SELECT member_id AS "MEMBER ID", due_date AS "DUE DATE", '$2' AS "LATE FEE" FROM BOOKS_TRANSACTIONS;
  • C. SELECT member_id AS MEMBER_ID, due_date AS DUE_DATE, $2 AS LATE_FEE
    FROM BOOKS_TRANSACTIONS;
  • D. SELECT member_id AS "MEMBER ID", due_date AS "DUE DATE", $2 AS "LATE FEE" FROM BOOKS_TRANSACTIONS;
Answer: B

NEW QUESTION # 174
Which two statements are true about the ORDER BY clause?
  • A. Numeric values are displayed in descending order if they have decimal positions.
  • B. NULLS are not included in the sort operation.
  • C. Column aliases can be used In the ORDER BY cause.
  • D. Only columns that are specified in the SELECT list can be used in the ORDER BY cause.
  • E. Ina character sort, the values are case-sensitive.
Answer: C,E

NEW QUESTION # 175
Which is the default column or columns for sorting output from compound queries using SET operators such as INTERSECT in a SQL statement?
  • A. The first column in the last SELECT of the compound query
  • B. The first VARCHAR2 column in the first SELECT of the compound query
  • C. The first column in the first SELECT of the compound query
  • D. The first NUMBER column in the first SELECT of the compound query
  • E. The first NUMBER or VARCHAR2 column in the last SELECTof the compound query
Answer: C
Explanation:
For the sorting of output in compound queries (INTERSECT, UNION, etc.):
* D. The first column in the first SELECT of the compound query: By default, Oracle does not automatically sort the results of SET operations unless an ORDER BY clause is explicitly stated.
However, if an ORDER BY is implied or specified without explicit columns, the default sorting would logically involve the first column specified in the first SELECT statement of the compound query.

NEW QUESTION # 176
Examine this data in the EMPLOYERS table:

Which statement will execute successfully?
  • A. SELECT dept_id, INSTR (last_name,'A'), SUM (salary) FROM employees GROUP BY dept_id
  • B. SELECT dept_id, STDDEV (last_name), SUM (salary) FROM employees GROUP BY dept_id
  • C. SELECT dept_id, MAX (Last_name), SUM (salary) FROM employees GROUP BY dept_id
  • D. SELECT dept_id, LENGTH (last_name), SUM (salary) FROM employees GROUP BY dept_id
Answer: C
Explanation:
In SQL, the GROUP BY clause is used in conjunction with aggregate functions to group the result-set by one or more columns.
A . This statement will execute successfully. MAX() is an aggregate function that can be used to return the highest value of the selected column, and SUM() is an aggregate function used to sum the values. Both are valid in the SELECT statement with a GROUP BY clause grouping the results by dept_id.
B . This statement will not execute successfully when used with GROUP BY because LENGTH(last_name) is not an aggregate function and it doesn't appear in the GROUP BY clause. All selected columns that are not under an aggregate function must be included in the GROUP BY clause.
C . This statement will not execute successfully because STDDEV() is an aggregate function that calculates the standard deviation of a set of numbers, and it can only be used on numeric data types. last_name is not a numeric column.
D . This statement will not execute successfully for the same reason as B: INSTR(last_name, 'A') is not an aggregate function and must appear in the GROUP BY clause if it's in the SELECT clause.
Reference:
Oracle Documentation on GROUP BY: https://docs.oracle.com/database ... 0002.htm#SQLRF01702 Oracle Documentation on Aggregate Functions: https://docs.oracle.com/database ... s004.htm#SQLRF51148

NEW QUESTION # 177
......
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