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Oracle 1z1-071 Exam Syllabus Topics:

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

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Oracle Database SQL 認定 1z1-071 試験問題 (Q17-Q22):

質問 # 17
View the Exhibit and examine the structure of the CUSTOMERS table.

Using the CUSTOMERS table, you must generate a report that displays a credit limit increase of 15% for all customers.
Customers with no credit limit should have "Not Available" displayed.
Which SQL statement would produce the required result?

A. SELECT NVL (cust_credit_limit, 'Not Available')*.15 "NEW CREDIT" FROM customers
B. SELECT TO_CHAR(NVL(cust_credit_limit*.15), 'Not Available')) "NEW CREDIT" FROM customers
C. SELECT NVL (cust_credit_limit*.15, 'Not Available') "NEW CREDIT" FROM customers
D. SELECT NVL (TO_CHAR(cust_credit_limit*.15), 'Not Available') "NEW CREDIT" FROM customers

正解：C

質問 # 18
The SALES table has columns PROD_IDand QUANTITY_SOLDof data type NUMBER.
Which two queries execute successfully?

A. BY COUNT(*) >10;
SELECT COUNT(prod_id) FROM sales GROUP BY prod_id WHERE quantity_sold > 55000;
B. COUNT(*) >10;
SELECT prod_id FROM sales WHERE quantity_sold > 55000 AND COUNT(*) > 10 GROUP
C. SELECT prod_id FROM sales WHERE quantity_sold > 55000 GROUP BY prod_id HAVING
D. BY prod_id HAVING COUNT(*) >10;
SELECT COUNT (prod_id) FROM sales WHERE quantity_sold > 55000 GROUP BY
E. prod_id;
SELECT prod_id FROM sales WHERE quantity_sold > 55000 AND COUNT(*) > 10 GROUP

正解：C、D

質問 # 19
Examine these statements executed in a single Oracle session:

Which three statements are true? (Choose three.)

A. The code for fountain penis 3.
B. There is no row containing pencil.
C. There is no row containing pen.
D. The code for penis 10.
E. There is no row containing fountain pen.
F. The code for penis 1.

正解：A、B、F

質問 # 20
Examine the command to create the BOOKS table.

The BOOK_ID value 101 does not exist in the table.
Examine the SQL statement:

Which statement is true?

A. It executes successfully only if the PUBLISHER_ID column name is added to the columns list in the INSERT statement.
B. It executes successfully only if NULL is explicitly specified in the INSERT statement.
C. It executes successfully and the row is inserted with a rule PUBLISHER_ID.
D. It executes successfully only if the PUBLISHER_ID column name is added to the columns list and NULL is explicitly specified in the INSERT statement.

正解：C

質問 # 21
The INVOICE table has a QTY_SOLD column of data type NUMBER and an INVOICE_DATE column of data type DATE NLS_DATE_FORMAT is set to DD-MON-RR.
Which two are true about data type conversions involving these columns in query expressions?

A. invoice_date> '01-02-2019': uses implicit conversion
B. qty_sold BETWEEN '101' AND '110': uses implicit conversion
C. invoice_date = '15-march-2019': uses implicit conversion
D. qty_sold ='05549821 ': requires explicit conversion
E. CONCAT(qty_sold, invoice_date): requires explicit conversion

正解：B、C

質問 # 22
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