1z0-071模擬問題集、1z0-071最新問題

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Oracle 1z0-071 Exam Syllabus Topics:

Section	Weight	Objectives
Topic 1: Retrieving Data Using the SQL SELECT Statement	5%	- Execute a basic SELECT statement - List the capabilities of SQL SELECT statements - Differentiate between SQL statements and SQL*Plus commands
Topic 2: Controlling User Access	5%	- Distinguish between granting privileges and roles - Grant privileges on tables and on a view - Differentiate system privileges from object privileges
Topic 3: Using Subqueries to Solve Queries	15%	- Define subqueries - Describe the types of problems that subqueries can solve - Write single-row and multi-row subqueries - List the types of subqueries
Topic 4: Manipulating Data	14%	- Control transactions - Describe each data manipulation language (DML) statement - Update rows in a table - Delete rows from a table - Insert rows into a table
Topic 5: Creating Other Schema Objects	10%	- Create synonyms for database objects - Create, modify, and retrieve data from a view - Create, maintain, and use sequences - Create and maintain indexes
Topic 6: Using Set Operators	5%	- Use a set operator to combine multiple queries into a single query - Describe set operators - Describe the order of precedence when the set operators are used
Topic 7: Using Conversion Functions and Conditional Expressions	10%	- Describe implicit and explicit data type conversion - Use the TO_CHAR, TO_NUMBER, and TO_DATE conversion functions - Use conditional IF THEN ELSE logic in a SELECT statement - Apply the NVL, NULLIF, and COALESCE functions to data
Topic 8: Reporting Aggregated Data Using Group Functions	15%	- Group data by using the GROUP BY clause - Describe the use of group functions - Include or exclude grouped rows by using the HAVING clause - Identify the available group functions
Topic 9: Restricting and Sorting Data	6%	- Limit the rows that are retrieved by a query - Use ampersand substitution to restrict and sort output at runtime - Sort the rows that are retrieved by a query - Use DEFINE and UNDEFINE commands
Topic 10: Working with Oracle Database SQL	8%	- Explain the installation of Oracle Database software - Create a container database - Start up and shut down a database - Describe the Oracle Database architecture
Topic 11: Displaying Data from Multiple Tables Using Joins	15%	- View data that does not meet a join condition by using outer joins - Cross join tables - Write SELECT statements to access data from more than one table using equijoins and non-equijoins - Join a table to itself by using a self-join
Topic 12: Using DDL Statements to Create and Manage Tables	14%	- Drop, rename, and truncate tables - Create a simple table - Describe the data types that are available for columns - Alter table definitions - Review the table structure - Categorize the main database objects
Topic 13: Using Single-Row Functions to Customize Output	10%	- Describe the differences between single-row and multiple-row functions - Manipulate strings with character function in the SELECT and WHERE clauses - Perform arithmetic with date data - Manipulate numbers with the ROUND, TRUNC, and MOD functions - Manipulate dates with the date functions

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Oracle Database SQL 認定 1z0-071 試験問題 (Q399-Q404):

質問 # 399
Examine the structure of the employees table.

There is a parent/child relationship betweenEMPLOYEE_IDandMANAGER_ID.
You want to display the last names and manager IDs of employees who work for the same manager asthe employee whoseEMPLOYEE_ID123.
Which query provides the correct output? A)

B)

C)

D)

A. Option A
B. Option C
C. Option D
D. Option B

正解：D

質問 # 400
You need to calculate the number of days from 1st January 2019 until today.
Dates are stored in the default format of DD-MON-RR.
Which two queries give the required output?

A. SELECT TO_DATE (SYSDATE, 'DD/MONTH/YYYY')-'01/JANUARY/2019' FROM DUAL;
B. SELECT ROUND (SYSDATE- '01-JAN-2019') FROM DUAL:
C. SELECT ROUND (SYSDATE-TO_DATE ('01/JANUARY/2019')) FROM DUAL;
D. SELECT TO_CHAR (SYSDATE, 'DD-MON-YYYY')-'01-JAN-2019' FROM DUAL;
E. SELECT SYSDATE-TO_DATE ('01-JANUARY-2019') FROM DUAL;

正解：C、E

解説：
To calculate the number of days between two dates in Oracle SQL, you can simply subtract the earlier date from the later date, and Oracle will return the number of days between them.
Option A uses SYSDATE to get the current date and TO_DATE to convert the string '01-JANUARY-2019' to a date using the default date format, which matches 'DD-MON-RR'. The subtraction here will correctly give the number of days between these two dates.
Option C is similar to A but includes the ROUND function, which is used to round the number to the nearest whole number. Since the difference between two dates in Oracle SQL is a decimal value representing the number of days and fractional days, rounding will give us the whole number of days, which is what we want.
Options B, D, and E are incorrect because they either use an invalid date format (the default format is 'DD-MON-RR', not 'DD/MONTH/YYYY' or 'DD-MON-YYYY'), perform invalid operations (such as subtracting a string from a date), or misuse SYSDATE.

質問 # 401
View the Exhibit and examine the details of the PRODUCT_INFORMATION table. (Choose two.)

Evaluate this SQL statement:
SELECT TO_CHAR (list_price, '$9,999')
From product_information;
Which two statements are true regarding the output?

A. A row whose LIST_PRICE column contains value 1123.90 would be displayed as
$ 1,124.
B. A row whose LIST_PRICE column contains value 1123.90 would be displayed as
$ 1,123.
C. A row whose LIST_PRICE column contains value 11235.90 would be displayed as
$ 1,123.
D. A row whose LIST_PRICE column contains value 11235.90 would be displayed as
# ######.

正解：A、D

質問 # 402
View the Exhibit and examine the structure of the ORDERS table.

Which UPDATE statement is valid?

A. UPDATE ordersSET order_date = '12-mar-2007',order_total = NULLWHERE order_id = 2455;
B. UPDATE ordersSET order_date = '12-mar-2007',AND order_total = TO_NUMBER(NULL)WHERE order_id = 2455;
C. UPDATE ordersSET order_date = TO_DATE('12-mar-2007','dd-mon-yyyy'),SET order_total = TO_NUMBER (NULL)WHERE order_id = 2455;
D. UPDATE ordersSET order_date = '12-mar-2007',order_total IS NULLWHERE order_id = 2455;

正解：A

質問 # 403
You execute the following commands:

For which substitution variables are you prompted for the input?

A. Only 'mgr_id'
B. None, because no input required
C. Only 'hiredate'
D. Both the substitution variables 'hiredate' and 'mgr_id\

正解：D

質問 # 404
......

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