1z0-071オンライン試験 & 1z0-071予想試験

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Oracle 1z0-071 Exam Syllabus Topics:

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

>> 1z0-071オンライン試験 <<

1z0-071予想試験 & 1z0-071試験内容

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Oracle Database SQL 認定 1z0-071 試験問題 (Q231-Q236):

質問 # 231
In the PROMOTIONS table, the PROMO_BEGIN_DATEcolumn is of data type DATEand the default date format is DD-MON-RR.
Which two statements are true about expressions using PROMO_BEGIN_DATEcontained a query? (Choose two.)

A. PROMO_BEGIN_DATE - SYSDATEwill return an error.
B. TO_DATE(PROMO_BEGIN_DATE * 5)will return a date.
C. PROMO_BEGIN_DATE - SYSDATEwill return a number.
D. PROMO_BEGIN_DATE- 5 will return a date.
E. TO_NUMBER(PROMO_BEGIN_DATE)- 5 will return a number.

正解：B、C

質問 # 232
Which three actions can you perform only with system privileges?

A. Access flat files via a database, which are stored in an operating system directory.
B. Log in to a database.
C. Execute a procedure in another schema.
D. Truncate a table in another schema.
E. Use the WITH GRANT OPTION clause.
F. Query any table in a database.

正解：A、B、D

解説：
A . Correct. Truncating a table, especially in another schema, requires the ALTER ANY TABLE or DROP ANY TABLE system privilege. B. Correct. Accessing external files through the database involves the CREATE ANY DIRECTORY privilege, which is a system privilege. C. Correct. Creating a session in a database, which is required to log in, necessitates the CREATE SESSION system privilege. D. Incorrect. Querying any table is an object privilege, which can be granted by the owner of the table. E. Incorrect. The WITH GRANT OPTION clause is used with object privileges, not system privileges. F. Incorrect. Executing a procedure in another schema requires the EXECUTE object privilege on that procedure.
Oracle Database Security Guide provides the details about system privileges necessary for these actions.

質問 # 233
View the Exhibit and examine the structure of the ORDERS table.
Which UPDATE statement is valid?

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

正解：C

質問 # 234
Which task can be performed by using a single Data Manipulation Language (DML) statement?

A. removing all data only from a single column on which a primary key constraint is defined
B. removing all data from a single column on which a unique constraint is defined
C. adding a column with a default value while inserting a row into a table
D. adding a column constraint while inserting a row into a table

正解：B

質問 # 235
View the exhibit and examine the ORDERStable.

The ORDERStable contains data and all orders have been assigned a customer ID. Which statement would add a NOTNULLconstraint to the CUSTOMER_IDcolumn?
ALTER TABLE orders

A. MODIFY CONSTRAINT orders_cust_id_nn NOT NULL (customer_id);
ALTER TABLE orders
B. MODIFY customer_id CONSTRAINT orders_cust_nn NOT NULL (customer_id);
ALTER TABLE orders
C. ADD CONSTRAINT orders_cust_id_nn NOT NULL (customer_id);
ALTER TABLE orders
D. ADD customer_id NUMBER(6)CONSTRAINT orders_cust_id_nn NOT NULL;

正解：B

解説：
Explanation/Reference:

質問 # 236
......

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