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Oracle 1z0-071日本語 Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Data Manipulation and Schema Objects | - DDL operations
|
| Subqueries and Advanced SQL | - Correlated subqueries and nested queries - Single-row and multi-row subqueries |
| SQL Functions | - Single-row functions
|
| Relational Database Concepts | - Data types and database objects overview - Tables, rows, columns, and relational model basics |
| SQL Retrieval | - SELECT statements and filtering data
|
Oracle Database SQL (1z0-071日本語版) Sample Questions:
Oracleデータベースのビューについて、正しい記述を3つ選びなさい。(3つ選択してください。)
- A. 定義クエリに WHERE 句を含むビューをクエリする場合、SELECT ステートメントには WHERE 句を含めることはできません。
- B. ビューを使用してテーブルに挿入された行は、ビューが削除されてもテーブルに保持されます。
- C. ビューにはオブジェクト番号がありません。
- D. ビューにセグメントがありません。
- E. ビューは、同じスキーマに属している場合にのみテーブルを結合できます。
- F. 定義クエリで存在しないテーブルを参照するビューを作成できます。
Correct Answer: B,C,F 🗳️
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ORD_ITEMStableのデータを調べてください。
このクエリを評価してください。
結果に関して、次のうち正しい記述はどれですか？
- A. HAVING句で使用されるすべての集計関数はSELECTリストで指定する必要があるため、エラーが返されます。
- B. テーブル内のすべてのアイテムの平均数量の2倍以上の平均数量を持つアイテム番号と平均数量を表示します。
- C. HAVING句はGROUP BY句の後に指定する必要があるため、エラーが返されます。
- D. 表の中で、平均数量がその商品の最小数量の2倍以上である商品番号と平均数量を表示します。
Correct Answer: D 🗳️
ORDER BY句のデフォルトの動作に関して、正しい記述はどれですか？
- A. ORDER BY句では、SELECTリストで指定された列のみを使用できます。
- B. ORDER BY句で列エイリアスを使用できます。
- C. 小数点以下の桁数がある数値は降順で表示されます。
- D. NULLはソート操作に含まれません。
- E. 文字ソートでは、値は大文字と小文字を区別します。
Correct Answer: E 🗳️
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内部結合と外部結合について、正しい記述を3つ選びなさい。
- A. 2つのテーブルに複数の結合条件がある場合、外部結合を使用できます。
- B. 左外部結合または右外部結合は、一致しない行のみを返します
- C. 内部結合は一致する行を返します
- D. 外部結合はクエリごとに2つまでしか使用できません
- E. フル外部結合では、一致する行と一致しない行の両方が返されます。
- F. フル外部結合ではOracle構文を使用する必要があります
Correct Answer: A,C,E 🗳️
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展示資料を参照し、PRODUCT_INFORMATION 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。)
PRODUCT_ID列は主キーです。
インデックスを作成するには、次のコマンドを使用します。
SQL > CREATE INDEX upper_name_idx
ON product_information(UPPER(product_name));
PRODUCT_INFORMATIONテーブルには、他にインデックスは存在しません。
どのクエリがUPPER_NAME_IDXインデックスを使用しますか？
- A. SELECT UPPER(product_name)
製品情報から; - B. SELECT product_id
製品情報から
WHERE UPPER(product_name) IN ('LASERPRO', 'CABLE'); - C. SELECT UPPER(product_name)
製品情報から
WHERE product_id = 2254; - D. SELECT product_id, UPPER(product_name)
製品情報から
WHERE UPPER(product_name) = 'LASERPRO' OR list_price > 1000;
Correct Answer: B 🗳️
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