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Oracle 1z1-071 Exam Syllabus Topics:

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

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Oracle Database SQL Sample Questions (Q108-Q113):

NEW QUESTION # 108
Which statement falls to execute successfully?

A. SELECT *
FROM employees e
JOIN departments d
ON e.department_id=d.department_id
WHERE d.department_id=90;
B. SELECT *
FROM employees e
JOIN department d
WHERE e.department_id=d.department_id
AND d.department_id=90;
C. SELECT *
FROM employees e
JOIN departments d
ON e.department_id=d.department_id
AND d.department_id=90;
D. SELECT *
FROM employees e
JOIN departments d
ON d.departments_id=90
WHERE e.department_id=d.department_id;

Answer: B

Explanation:
Given the statements, the failure to execute would be due to improper SQL syntax or logical structuring of the JOIN clause:
* A. SELECT * FROM employees e JOIN department d WHERE
e.department_id=d.department_id AND d.department_id=90: This statement will fail because it incorrectly uses the JOIN syntax without an ON clause, which is necessary to specify the condition on which the tables are joined. This statement mistakenly places the join condition in the WHERE clause without using ON.
Correct options (executes successfully):
* B: Correctly formulated JOIN with ON and an additional condition in the WHERE clause.
* C: Incorporates the filtering directly in the ON clause, which is a valid method to restrict the rows returned by the JOIN based on conditions related to both tables.
* D: Although it appears awkward due to the order of conditions in the ON clause, it is syntactically correct.
These answers reflect typical use and constraints in SQL queries and are aligned with Oracle Database 12c standards for SQL syntax and operations.

NEW QUESTION # 109
Examine this description of the PRODUCTS table:

You successfully execute this command:

Which two statements execute without errors? (Choose two.)

Answer: B,D

NEW QUESTION # 110
Which three statements are true about inner and outer joins?

A. A full outer join returns matched and unmatched rows.
B. Outer joins can only be used between two tables per query.
C. An inner join returns matched rows.
D. A full outer join must use Oracle syntax.
E. Outer joins can be used when there are multiple join conditions on two tables.
F. A left or right outer join returns only unmatched rows.

Answer: A,C

Explanation:
A: True. A full outer join does indeed return both matched and unmatched rows from both tables involved in the join. It combines the results of both left and right outer joins.
E: True. An inner join, by definition, returns rows that have matching values in both tables. Rows from both tables that do not match are not returned in an inner join result set.
Inner joins match rows from the joined tables based on the join condition, while outer joins include all rows from one or both tables regardless of whether a matching row exists in the other table.
References:The Oracle SQL documentation explains different types of joins, including inner joins, left and right outer joins, and full outer joins, clarifying how they differ in the result sets they produce.

NEW QUESTION # 111
Which two are true about queries using set operators (UNION, UNION ALL, INTERSECT and MINUS)?

A. The name of each column in the first SELECT list must match the name of the corresponding column in each subsequent SELECT list.
B. Each SELECT statement in the query can have an ORDER BY clause.
C. None of the set operators can be used when selecting CLOB columns.
D. The FOR UPDATE clause cannot be specified.
E. There must be an equal number of columns in each SELECT list.

Answer: D,E

Explanation:
A). True. When using set operators, the number and order of columns must be the same in all SELECT statements involved in the query. The data types of those columns must also be compatible.
E). True. The FOR UPDATE clause cannot be specified in a subquery or a SELECT statement that is combined with another SELECT statement by using a set operator.
B is incorrect because the column names do not need to match; only the number and data types of the columns must be compatible. C is incorrect because only the final SELECT statement in the sequence of UNION/INTERSECT/MINUS operations can have an ORDER BY clause. D is incorrect because, as of Oracle 12c, UNION ALL can be used with CLOB columns, but UNION, INTERSECT, and MINUS cannot.

NEW QUESTION # 112
Evaluate the following CREATE TABLE commands:
CREATE_TABLE orders
( ord_no NUMBER (2) CONSTRAINT ord_pk PRIMARY KEY,
ord_date DATE,
cust_id NUMBER (4));
CREATE TABLE ord_items
( ord _no NUMBER (2),
item_no NUMBER(3),
qty NUMBER (3) CHECK (qty BETWEEEN 100 AND 200),
expiry_date date CHECK (expiry_date> SYSDATE),
CONSTRAINT it_pk PRIMARY KEY (ord_no, item_no),
CONSTARAINT ord_fk FOREIGN KEY (ord_no) REFERENCES orders (ord_no) );
Why would the ORD_ITEMStable not get created?

A. The CHECKconstraint cannot be placed on columns having the DATEdata type.
B. The BETWEENclause cannot be used twice for the same table.
C. ORD_NOand ITEM_NOcannot be used as a composite primary key because ORD_NOis also the FOREIGN KEY.
D. SYSDATEcannot be used with the CHECK constraint.

Answer: D

NEW QUESTION # 113
......

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