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1Z0-171考試資料, 1Z0-171權威認證, 1Z0-171資料, 1Z0-171認證, 新版1Z0-171題庫

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Oracle 1Z0-171 Exam Syllabus Topics:

Section Weight Objectives
Topic 1: Using Subqueries 5% - Single-row and multi-row subqueries
- Correlated subqueries for update and delete
Topic 2: Managing Indexes, Synonyms, Sequences 5% - Create and manage sequences
- Create and manage synonyms
- Create and manage indexes
Topic 3: DDL for Tables and Relationships 15% - Views management
- Temporary and external tables
- CREATE TABLE statement
- Drop columns, set unused columns
- TRUNCATE TABLE statement
- Constraints management
- Table structure, columns, data types
Topic 4: Displaying Data from Multiple Tables 10% - Different types of joins: equijoin, non-equijoin, outer join, self-join
- Cartesian products
Topic 5: Retrieving and Sorting Data 15% - Limiting rows and substitution variables
- Operators, literals, DISTINCT keyword
- DEFINE and VERIFY commands
- Operator precedence rules
- Sorting query results
- Arithmetic expressions and NULL values
- Using SELECT statement and column aliases
Topic 6: Using SET Operators 5% - Using ORDER BY with set operations
- Matching SELECT statements
- UNION, UNION ALL, INTERSECT, MINUS operators
Topic 7: Controlling User Access 5% - Granting privileges on tables
- Roles creation and privilege assignment
- System vs object privileges
Topic 8: Data Dictionary and Time Zones 5% - Using data dictionary views
- INTERVAL data types
- CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP
Topic 9: Using Functions 25% - TO_CHAR, TO_NUMBER, TO_DATE conversion functions
- Group functions and grouping data
- Data type conversion: implicit and explicit
- Restricting group results
- NVL, NULLIF, COALESCE functions
- Character functions for string manipulation
- Nested functions
- Date arithmetic and date functions
- ROUND, TRUNC, MOD functions
Topic 10: Relational Database Concepts 5% - Relationship between database and SQL
- SQL SELECT clauses and ERD components
- Relational database theoretical and physical aspects
Topic 11: Managing Tables with DML 5% - Multi-table INSERT and MERGE statements
- INSERT, UPDATE, DELETE operations
- Transaction management and control

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最新的 Oracle Database 1Z0-171 免費考試真題 (Q76-Q81):

問題 #76
What is the output of the following query?
SELECT CURRENT_DATE FROM dual;

  • A. The current date in the session time zone
  • B. The current date in the database time zone
  • C. The current date and time in UTC
  • D. The current date and time in the database time zone

答案：A


問題 #77
Which function is used to convert a string to uppercase in SQL?

  • A. UPPER
  • B. CASE_UPPER
  • C. CONVERT_UPPER
  • D. TO_UPPERCASE

答案：A


問題 #78
What does the EXISTS operator check in a subquery?

  • A. If the subquery returns any rows
  • B. If the subquery contains only unique values
  • C. If the subquery references the outer query
  • D. If the subquery returns a specific number of rows

答案：A


問題 #79
Which type of join retrieves only the rows with matching values in both tables?

  • A. OUTER JOIN
  • B. NATURAL JOIN
  • C. CROSS JOIN
  • D. INNER JOIN

答案：D


問題 #80
What is a subquery in SQL?

  • A. A query used for joining two or more tables
  • B. A query that combines data from multiple tables
  • C. A query used to create a table
  • D. A query inside another query

答案：D


問題 #81
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