Oracle 1z1-071基礎問題集 & 1z1-071日本語版テキスト内容

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Oracle 1z1-071 Exam Syllabus Topics:

Section	Weight	Objectives
Restricting and Sorting Data	15%	- ORDER BY clause and sorting rules - Substitution variables, DEFINE and VERIFY commands - Operator precedence - WHERE clause and filtering conditions
Managing Tables and Constraints		- Constraints: primary key, foreign key, unique, check, not null - Data types, creating/altering/dropping tables - Temporary and external tables
Controlling User Access		- Roles, granting and revoking privileges - System and object privileges
Managing Views		- Updatable and read-only views - Create, modify and drop views
Using Subqueries to Solve Queries		- Single-row and multi-row subqueries - Correlated subqueries for update/delete
Aggregating Data Using Group Functions	10%	- Handling NULLs in group functions - GROUP BY and HAVING clauses - SUM, AVG, COUNT, MAX, MIN functions
Manipulating Data and Managing Transactions		- Transaction control: COMMIT, ROLLBACK, SAVEPOINT - INSERT, UPDATE, DELETE, MERGE statements - Multi-table inserts
Retrieving Data Using SQL SELECT Statement	20%	- Arithmetic operations and NULL handling - SELECT statement syntax and usage - Column aliases, concatenation, literals and DISTINCT
Relational Database Concepts	10%	- Theoretical and physical aspects of relational databases - ERD and SQL statement mapping - Relationship between database and SQL
Using Single-Row Functions to Customize Output	20%	- Nested functions usage - Character, number, and date functions
Managing Indexes, Synonyms and Sequences		- Create and use synonyms - Create and maintain indexes - Create and use sequences
Conversion Functions and Conditional Expressions	10%	- TO_CHAR, TO_NUMBER, TO_DATE functions - NVL, NULLIF, COALESCE and CASE expressions - Implicit and explicit data type conversion
Displaying Data from Multiple Tables	15%	- Self-joins and outer joins - Cartesian products - Equijoins and non-equijoins
Working with Time Zones and Date/Time Data		- Time zone conversion functions - TIMESTAMP, INTERVAL data types
Using SET Operators		- UNION, UNION ALL, INTERSECT, MINUS operators - Ordering results with set operations
Using Data Dictionary Views		- Retrieve metadata and object information

>> Oracle 1z1-071基礎問題集 <<

1z1-071日本語版テキスト内容、1z1-071勉強ガイド

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Oracle Database SQL 認定 1z1-071 試験問題 (Q48-Q53):

質問 # 48
Examine the description of the BOOKS_TRANSACTIONS table:

Which two WHERE conditions give the same result?

A. WHERE (borrowed_date = SYSDATE AND transaction_type ='RM') OR member_id IN ('A101','A102');
B. WHERE borrowed_date = SYSDATE AND (transaction_type ='RM' AND (member_id ='A101' OR member_id ='A102') );
C. WHERE borrowed_date = SYSDATE AND (transaction_type ='RM' AND member_id='A101' OR member_id ='A102'));
D. WHERE borrowed_date = SYSDATE AND transaction_type ='RM' OR member_id IN ('A101','A102');
E. WHERE borrowed_date = SYSDATE AND (transaction_type ='RM' OR member_id IN ('A101','A102'));

正解：A、D

質問 # 49
View the exhibit and examine the structure of the SALES, CUSTOMERS, PRODUCTSand TIMEStables.

The PROD_IDcolumn is the foreign key in the SALEStable, which references the PRODUCTStable.
Similarly, the CUST_IDand TIME_IDcolumns are also foreign keys in the SALEStable referencing the CUSTOMERSand TIMEStables, respectively.
Evaluate the following CREATE TABLEcommand:
CREATE TABLE new_sales (prod_id, cust_id, order_date DEFAULT SYSDATE)
AS
SELECT prod_id, cust_id, time_id
FROM sales;
Which statement is true regarding the above command?

A. The NEW_SALEStable would not get created because the DEFAULTvalue cannot be specified in the column definition.
B. The NEW_SALEStable would not get created because the column names in the CREATETABLEcommand and the SELECTclause do not match.
C. The NEW_SALEStable would get created and all the FOREIGNKEYconstraints defined on the specified columns would be passed to the new table.
D. The NEW_SALEStable would get created and all the NOTNULLconstraints defined on the specified columns would be passed to the new table.

正解：D

質問 # 50
Examine the description of the PRODUCT_INFORMATION table:

A. SELECT count(nvl( list_price,0)) FROM product_information WHERE list_price is null;
B. SELECT (COUNT(list_price) FROM Product_intormation WHERE list_price=NULL;
C. SELECT COUNT(DISTINCT list_price) FROM product_information WHERE list_price is null.
D. BELECT COUNT(list_price) FROM product_information where list_price is NULL;

正解：A

質問 # 51
You must create a table EMPLOYEES in which the values in the columns EMPLOYEES_ID and LOGIN_ID must be unique and not null.
Which two SQL statements would create the required table? (Choose two.)

A. CREATE TABLE employees
( employee_id NUMBER,
login_id NUMBER,
employee_name VARCHAR2(100),
hire_date DATE,
CONSTRAINT emp_id_uk UNIQUE (employee_id, login_id);
CONSTRAINT emp_id_nn NOT NULL (employee_id, login_id));
B. CREATE TABLE employees
( employee_id NUMBER,
login_id NUMBER,
employee_name VARCHAR2(100),
hire_date DATE,
CONSTRAINT emp_id_uk UNIQUE (employee_id, login_id));
C. CREATE TABLE employees
( employee_id NUMBER CONSTRAINT emp_id_pk PRIMARY KEY,
login_id NUMBER UNIQUE,
employee_name VARCHAR2(25),
hire_date DATE);
D. CREATE TABLE employees
( employee_id NUMBER CONSTRAINT emp_id_nn NOT NULL,
login_id NUMBER CONSTRAINT login_id_nn NOT NULL,
employee_name VARCHAR2(100),
hire_date DATE,
CONSTRAINT emp_num_id_uk UNIQUE (employee_id, login_id));
E. CREATE TABLE employees
( employee_id NUMBER,
login_id NUMBER,
employee_name VARCHAR2(25),
hire_date DATE,
CONSTRAINT emp_id_pk PRIMARY KEY (employee_id, login_id));

正解：D、E

質問 # 52
Examine the description of the PRODUCTS table:

Which three queries use valid expressions?

A. SELECT product_id, (unit_price * 0.15 / (4.75 + 552.25)) FROM products;
B. SELECT ptoduct_id, (expiry_date-delivery_date) * 2 FROM products;
C. SELECT produet_id, unit_pricer, 5 "Discount",unit_price+surcharge-discount FROM products;
D. SELEGT product_id, unit_price, unit_price + surcharge FROM products;
E. SPLECT product_id, expiry_date * 2 FROM products;
F. SELECT product_id,unit_price || "Discount", unit_price + surcharge-discount FROM products;

正解：A、B、D

解説：
B . SELECT product_id, (unit_price * 0.15 / (4.75 + 552.25)) FROM products; C. SELECT product_id, (expiry_date - delivery_date) * 2 FROM products; E. SELECT product_id, unit_price, unit_price + surcharge FROM products; Comprehensive and Detailed Explanation WITH all Reference:
A . This is invalid because "Discount" is a string literal and cannot be used without quotes in an arithmetic operation. Also, there is a typo in unit_pricer, and 'discount' is not a defined column in the table. B. This is valid. It shows a mathematical calculation with unit_price, which is of NUMBER type. Division and multiplication are valid operations on numbers. C. This is valid. The difference between two DATE values results in the number of days between them, and multiplying this value by a number is a valid operation. D. This is invalid because expiry_date is of DATE type and cannot be multiplied by a number. Also, there's a typo: "SPLECT" should be "SELECT". E. This is valid. Both unit_price and surcharge are NUMBER types, and adding them together is a valid operation. F. This is invalid because concatenation operator || is used between a number (unit_price) and a string literal "Discount", which is not enclosed in single quotes, and 'discount' is not a defined column in the table.
In SQL, arithmetic operations on numbers and date arithmetic are valid expressions. Concatenation is also a valid expression when used correctly between string values or literals. Operations that involve date types should not include multiplication or division by numbers directly without a proper interval type in Oracle SQL.
These rules are detailed in the Oracle Database SQL Language Reference, where expressions, datatype precedence, and operations are defined.

質問 # 53
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