這幾年IT行業發展非常之迅速，那麼學IT的人也如洪水猛獸般迅速多了起來，他們為了使自己以後有所作為而不斷的努力，Oracle的1Z1-171考試認證是IT行業必不可少的認證，許多人為想通過此認證而感到苦惱。今天我告訴大家一個好辦法，就是選擇Testpdf Oracle的1Z1-171考試認證培訓資料，它可以幫助你們通過考試獲得認證，而且我們可以保證通過率100%，如果沒有通過，我們將保證退還全部購買費用，不讓你們有任何損失。
| Section | Weight | Objectives |
|---|---|---|
| Managing Indexes, Synonyms, Sequences | 5% | - Create and manage sequences - Create and manage synonyms - Create and manage indexes |
| Controlling User Access | 5% | - System vs object privileges - Roles creation and privilege assignment - Granting privileges on tables |
| Relational Database Concepts | 5% | - SQL SELECT clauses and ERD components - Relational database theoretical and physical aspects - Relationship between database and SQL |
| Using Functions | 25% | - ROUND, TRUNC, MOD functions - Nested functions - Data type conversion: implicit and explicit - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - Date arithmetic and date functions - Group functions and grouping data - NVL, NULLIF, COALESCE functions - Restricting group results - Character functions for string manipulation |
| Managing Tables with DML | 5% | - Multi-table INSERT and MERGE statements - Transaction management and control - INSERT, UPDATE, DELETE operations |
| Data Dictionary and Time Zones | 5% | - Using data dictionary views - INTERVAL data types - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP |
| Using SET Operators | 5% | - Using ORDER BY with set operations - Matching SELECT statements - UNION, UNION ALL, INTERSECT, MINUS operators |
| DDL for Tables and Relationships | 15% | - CREATE TABLE statement - TRUNCATE TABLE statement - Drop columns, set unused columns - Temporary and external tables - Table structure, columns, data types - Views management - Constraints management |
| Retrieving and Sorting Data | 15% | - Arithmetic expressions and NULL values - Operator precedence rules - Using SELECT statement and column aliases - Operators, literals, DISTINCT keyword - DEFINE and VERIFY commands - Sorting query results - Limiting rows and substitution variables |
| Using Subqueries | 5% | - Single-row and multi-row subqueries - Correlated subqueries for update and delete |
| Displaying Data from Multiple Tables | 10% | - Cartesian products - Different types of joins: equijoin, non-equijoin, outer join, self-join |
1Z1-171 認證是互聯網界具有極大聲望的網路技能認證，在全球，通過IBM認證考試的工程師，平均年薪在10萬元以上。通過 HP 認證考試的工程師，平均年薪在30萬元以上。獲得 Oracle 的 1Z1-171 認證的工程師，平均年薪也不低於20萬人民幣。據說，這還只是基本工資，不包括獎金，紅利和其他非工資性補貼。難怪美國副總統戈爾曾把 Oracle 1Z1-171 認證恰當而幽默地稱為“獲得高技術，高薪水的頭等艙船票”。
問題 #11
Which clause in a SQL SELECT statement is used to define the columns to be retrieved?
答案：C
問題 #12
What is the purpose of the DBA_OBJECTS data dictionary view?
答案：D
問題 #13
What is a role in Oracle Database?
答案：A
問題 #14
Which clause is used to ensure that only specific rows are deleted in a DELETE statement?
答案：D
問題 #15
Which of the following SQL commands retrieves data from a relational database?
答案：C
問題 #16
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