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Why do I need to take ORACLE 1Z0-071 Certification?
Today, there are literally clusters of certification exams available to learn new skills, develop, update your skills, or improve your career growth in a corporate sector. Thousands of people take these exams every year, and it is a great way for professionals to stay competitive in the market. However, you have more options than ever before on how to prepare for these exams, and it can be overwhelming trying to decide which course of action is best for you. In this article, I will address some of the main ways that students can prepare themselves for the ORACLE 1Z0-071 exam. First off, some tools like Oracle 1Z0-071 Dumps, available online may help you with some studying materials while others help with sample practice questions and a bit more detail on certain examtopics. So let us learn about ORACLE 1Z0-071 and take the first step to achieve what you want.
Topics of ORACLE 1Z0-071 Certification Exam
Oracle 1Z0-071 Dumps covers the following topics of the ORACLE 1Z0-071 exam.
- Data Integrity and Recovery
- XML Fundamentals
- SQL Fundamentals
- Oracle Architecture
- Indexing and Partitioning
- Oracle Database Concepts
- Data Management Concepts
- SQL Language Features
- SQL Performance Tuning
The Oracle 1Z0-071 is a certification exam that proves the candidate’s knowledge of SQL technology and SQL concepts required to participate in any database project. The target audience for this exam is the IT professionals with some experience in working with these technologies. The fundamental knowledge of general computing concepts and command line interfaces will be an advantage as well.
Oracle 1z0-071日本語 Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Relational Database Concepts | - Tables, rows, columns, and relational model basics - Data types and database objects overview |
| SQL Retrieval | - Joins and set operations
|
| Data Manipulation and Schema Objects | - DML operations
|
| Subqueries and Advanced SQL | - Single-row and multi-row subqueries - Correlated subqueries and nested queries |
| SQL Functions | - Conversion and conditional functions
|
Oracle Database SQL (1z0-071日本語版) Sample Questions:
以下の関係の種類と例を検討してください。
1. 教師と生徒の個別指導
2. 一対多 b) 従業員からマネージャーへ
3 多対一 c) 個人と社会保障番号
4 多対多 d) 顧客と製品
どの選択肢が、正しく一致した関係性を示していますか？
- A. 1-c、2-d、3-a、および4-b
- B. 1-c、2-a、3-b、4-d
- C. 1-d、2-b、3-a、および4-c
- D. 1-a、2-b、3-c、および4-d
Correct Answer: B 🗳️
どちらの2つが正常に実行されるでしょうか？(2つ選択してください。)
- A. SELECT COALESCE('DATE', SYSDATE) FROM (SELECT NULL AS "DATE" FROM DUAL);
- B. SELECT NVL('DATE', SYSDATE) FROM DUAL;
- C. SELECT NVL('DATE', 200) FROM (SELECT NULL AS "DATE" FROM DUAL);
- D. SELECT COALESCE(0, SYSDATE) FROM DUAL;
- E. SELECT COALESCE('DATE', SYSDATE) FROM DUAL;
Correct Answer: A,D 🗳️
SELECT文のWHERE句とHAVING句に関して、正しい記述はどれですか？(2つ選択してください。)
- A. WHERE句は、行をグループに分割した後に除外するために使用できます。
- B. HAVING句は、サブクエリ内の集計関数で使用できます。
- C. HAVING句で使用される集計関数と列は、クエリのSELECTリストで指定する必要があります。
- D. WHERE句を使用すると、行をグループに分割する前に除外できます。
- E. WHERE句とHAVING句は、テーブル内の異なる列に適用される場合にのみ、同じステートメントで使用できます。
Correct Answer: B,D 🗳️
集合演算子(UNION、UNION ALL、INTERSECT、MINUS)を用いたクエリについて、正しい記述はどれですか？(2つ選択してください。)
- A. CLOB列を選択する際には、集合演算子はどれも使用できません。
- B. 各SELECTリストには、同じ数の列が含まれている必要があります。
- C. 最初のSELECTリストの各列名は、後続の各SELECTリストの対応する列名と一致している必要があります。
- D. クエリ内の各 SELECT ステートメントには ORDER BY 句を含めることができます。
- E. FOR UPDATE句を指定できません。
Correct Answer: A,E 🗳️
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ORDERSテーブルの構造を調べてください。(最適な回答を選択してください。)
各年の全注文の合計金額を求めたい場合は、以下のコマンドを実行してください。
SQL> SELECT TO_CHAR(order_date,'rr'),
SUM(order_total) FROM orders
TO_CHAR(order_date, 'yyyy')でグループ化します。
結果に関して、次のうち正しい記述はどれですか？
- A. SELECT リストのデータ型変換が GROUP BY 句のデータ型変換と一致しないため、エラーが返されます。
- B. TO_CHAR関数が無効であるため、エラーが返されます。
- C. 正常に実行され、正しい出力が得られます。
- D. 正常に実行されますが、正しい出力が得られません。
Correct Answer: A 🗳️
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