Free 1z1-071 Study Material - High-quality Oracle Learning 1z1-071 Mode: Oracle Database SQL

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Oracle 1z1-071 Exam Syllabus Topics:

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

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Oracle Database SQL Sample Questions (Q148-Q153):

NEW QUESTION # 148
Examine the data in the ENPLOYEES table:

Which statement will compute the total annual compensation tor each employee?

A. SECECT last_namo, (menthy_salary + monthly_commission_pct) * 12 AS annual_comp
FROM employees;
B. SELCECT last_namo, (monthly_salary * 12) + (monthly_commission_pct * 12) AS annual_comp
FROM employees
C. SELCECT last_namo, (monthly_salary * 12) + (menthy_salary * 12 * monthly_commission_pct)
AS annual_comp FROM employees
D. SELCECT last_namo, (monthly_salary * 12) + (menthy_salary * 12 * NVL
(monthly_commission_pct, 0)) AS annual_comp FROM employees

Answer: D

NEW QUESTION # 149
View the Exhibit and examine the structure of the PRODUCTtable.

Which two tasks would require subqueries? (Choose two.)

A. display the minimum list price for each product status
B. display the number of products whose list prices are more than the average list price
C. display all suppliers whose list price is more than 1000
D. display all products whose minimum list price is more than the average list price of products having the status 'orderable'
E. display the total number of products supplied by supplier 102 and have product status as 'OBSOLETE'

Answer: B,D

NEW QUESTION # 150
Evaluate the following SQL commands:

The command to create a table fails. Identify the reason for the SQL statement failure.

A. You cannot use the NEXTVAL sequence value as a DEFAULT value for a column.
B. You cannot use ORD_NO and ITEM_NO columns as a composite primary key because ORD_NO is also the FOREIGN KEY.
C. You cannot use the BETWEEN clause in the condition of a CHECK constraint.
D. You cannot use SYSDATE in the condition of a CHECK constraint.

Answer: D

NEW QUESTION # 151
Which three statements are true about views in an Oracle Database?

A. Views have no object number.
B. Rows inserted into a table using a view are retained in the table if the view is dropped.
C. A view can be created that refers to a non-existent table in its defining query.
D. A SELECT statement cannot contain a WHERE clause when querying a view containing a WHERE clause in its defining query.
E. Views have no segment.
F. Views can join tables only if they belong to the same schema.

Answer: A,C,F

NEW QUESTION # 152
Which two statements are true regarding the COUNTfunction?

A. COUNT(DISTINCT inv_amt)returns the number of rows excluding rows containing duplicates and NULLvalues in the INV_AMTcolumn.
B. A SELECTstatement using the COUNTfunction with a DISTINCTkeyword cannot have a WHERE clause.
C. COUNT (*)returns the number of rows including duplicate rows and rows containing NULLvalue in any of the columns.
D. The COUNTfunction can be used only for CHAR, VARCHAR2, and NUMBERdata types.
E. COUNT(cust_id)returns the number of rows including rows with duplicate customer IDs and NULL value in the CUST_IDcolumn.

Answer: A,C

NEW QUESTION # 153
......

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