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Oracle 1z0-071 Exam Syllabus Topics:

Section	Weight	Objectives
Using Single-Row Functions to Customize Output	10%	- Manipulate strings with character function in the SELECT and WHERE clauses - Describe the differences between single-row and multiple-row functions - Manipulate numbers with the ROUND, TRUNC, and MOD functions - Manipulate dates with the date functions - Perform arithmetic with date data
Working with Oracle Database SQL	8%	- Start up and shut down a database - Describe the Oracle Database architecture - Explain the installation of Oracle Database software - Create a container database
Restricting and Sorting Data	6%	- Limit the rows that are retrieved by a query - Use DEFINE and UNDEFINE commands - Use ampersand substitution to restrict and sort output at runtime - Sort the rows that are retrieved by a query
Creating Other Schema Objects	10%	- Create synonyms for database objects - Create, maintain, and use sequences - Create, modify, and retrieve data from a view - Create and maintain indexes
Controlling User Access	5%	- Grant privileges on tables and on a view - Differentiate system privileges from object privileges - Distinguish between granting privileges and roles
Displaying Data from Multiple Tables Using Joins	15%	- View data that does not meet a join condition by using outer joins - Cross join tables - Join a table to itself by using a self-join - Write SELECT statements to access data from more than one table using equijoins and non-equijoins
Manipulating Data	14%	- Insert rows into a table - Describe each data manipulation language (DML) statement - Delete rows from a table - Control transactions - Update rows in a table
Using Conversion Functions and Conditional Expressions	10%	- Describe implicit and explicit data type conversion - 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
Using DDL Statements to Create and Manage Tables	14%	- Categorize the main database objects - Describe the data types that are available for columns - Create a simple table - Drop, rename, and truncate tables - Alter table definitions - Review the table structure
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
Reporting Aggregated Data Using Group Functions	15%	- Include or exclude grouped rows by using the HAVING clause - Group data by using the GROUP BY clause - Identify the available group functions - Describe the use of group functions
Retrieving Data Using the SQL SELECT Statement	5%	- List the capabilities of SQL SELECT statements - Execute a basic SELECT statement - Differentiate between SQL statements and SQL*Plus commands
Using Subqueries to Solve Queries	15%	- Define subqueries - Describe the types of problems that subqueries can solve - Write single-row and multi-row subqueries - List the types of subqueries

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최신 Oracle PL/SQL Developer Certified Associate 1z0-071 무료샘플문제 (Q41-Q46):

질문 # 41
Which two statements are true about the ORDER BY clause when used with a SQL statement containing a SET operator such as UNION? (Choose two.)

A. Only column names from the first SELECT statement in the compound query are recognized.
B. Each SELECT statement in the compound query can have its own ORDER BY clause.
C. Each SELECT statement in the compound query must have its own ORDER BY clause.
D. Column positions must be used in the ORDER BY clause.
E. The first column in the first SELECT of the compound query with the UNION operator is used by default to sort output in the absence of an ORDER BY clause.

정답：A,B

질문 # 42
Which statement is true regarding the INTERSECToperator?

A. Reversing the order of the intersected tables alters the result.
B. The names of columns in all SELECTstatements must be identical.
C. The number of columns and data types must be identical for all SELECTstatements in the query.
D. It ignores NULLvalues.

정답：C

설명：
Explanation/Reference:
References:
http://oraclexpert.com/using-the-set-operators/

질문 # 43
Examine the command to create the BOOKS table.

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

Which statement is true?

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

정답：D

질문 # 44
Which two are true about the precedence of opertors and condtions

A. NOT has a higher order of precedence than AND and OR in a condition.
B. Operators are evaluated before conditions.
C. + (addition) has a higher order of precedence than * (mliplpition)
D. AND and OR have the same order of precedence in a condition
E. || has a higher order of precedence than +(addition)

정답：A,E

설명：
Regarding the precedence of operators and conditions in Oracle Database 12c:
* Option B: NOT has a higher order of precedence than AND and OR in a condition.
* In logical operations, NOT is evaluated first, followed by AND and then OR.
* Option E: || has a higher order of precedence than +(addition).
* The string concatenation operator || has a higher precedence than the arithmetic + operator.
Options A, C, and D are incorrect because:
* Option A: Multiplication (*) has a higher precedence than addition (+).
* Option C: AND has a higher precedence than OR.
* Option D: Conditions (which may contain operators) are evaluated according to the rules of operator precedence.

질문 # 45
Which two are true about virtual columns?

A. They can be referenced in the set clause of an update statement as the name of the column To be updated.
B. They can be referenced In the where clause of an update or debete statement.
C. They can be indexed.
D. They can be referenced in the column expression of another virtxial column.
E. They cannot have a data type explicitly specified.

정답：C,E

설명：
Regarding the properties and capabilities of virtual columns in Oracle Database:
* C. They can be indexed: In Oracle, virtual columns can indeed be indexed. This allows for performance optimization on queries that utilize these columns, despite the fact that their values are derived and not stored physically.
* D. They cannot have a data type explicitly specified: The data type of a virtual column is derived from the expression used to define it. Therefore, it is not specified explicitly but is inferred from the expression itself.
Incorrect options:
* A: Virtual columns cannot be referenced in the WHERE clause of UPDATE or DELETE statements because they are not stored and cannot be individually modified.
* B: Virtual columns cannot be referenced in the SET clause of an UPDATE statement since they are derived from other column values and cannot be updated directly.
* E: Virtual columns cannot reference other virtual columns in their expressions due to the potential for recursive and complex dependencies.

질문 # 46
......

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