一生懸命に1z0-071難易度 &合格スムーズ1z0-071日本語版と英語版 |信頼できる1z0-071試験対策書Oracle Database SQL

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Oracle 1z0-071 Exam Syllabus Topics:

SectionObjectives
Topic 1: Data Manipulation and Schema Objects- DDL operations
  • 1. CREATE, ALTER, DROP tables and constraints
    - DML operations
    • 1. INSERT, UPDATE, DELETE, MERGE
      Topic 2: SQL Retrieval- SELECT statements and filtering data
      • 1. ORDER BY and row limiting
        • 2. WHERE clause and conditions
          - Joins and set operations
          • 1. INNER, OUTER, CROSS joins
            • 2. UNION, INTERSECT, MINUS
              Topic 3: SQL Functions- Conversion and conditional functions
              • 1. TO_CHAR, TO_NUMBER, CASE expressions
                - Single-row functions
                • 1. Character, numeric, date functions
                  Topic 4: Subqueries and Advanced SQL- Single-row and multi-row subqueries
                  - Correlated subqueries and nested queries
                  Topic 5: Relational Database Concepts- Tables, rows, columns, and relational model basics
                  - Data types and database objects overview

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                  Oracle Database SQL 認定 1z0-071 試験問題 (Q315-Q320):

                  質問 # 315
                  You want to return the current date and time from the user session, with a data type of TIMESTAMP WITH TIME ZONE.
                  Which function will do this?

                  正解：C

                  解説：
                  A: CURRENT_DATE returns the current date in the session time zone, not with a TIMESTAMP WITH TIME ZONE data type.
                  B: CURRENT_TIMESTAMP returns the current date and time in the session time zone with a TIMESTAMP WITH TIME ZONE data type. This is correct.
                  C: SYSDATE returns the current date and time from the operating system of the database server in the DATE data type.
                  D: LOCALTIMESTAMP returns the current date and time in the session time zone with a TIMESTAMP data type, without the TIME ZONE.
                  The TIMESTAMP WITH TIME ZONE data type and relevant functions are documented in the Oracle Database SQL Language Reference 12c.


                  質問 # 316
                  Examine the structure of the CUSTOMERS table: (Choose two.)
                  CUSTNO is the PRIMARY KEY.
                  You must determine if any customers' details have been entered more than once using a different CUSTNO, by listing all duplicate names.
                  Which two methods can you use to get the required result?

                  正解：D、E


                  質問 # 317
                  Which two are true about granting object privileges on tables, views, and sequences?

                  正解：A、C

                  解説：
                  Object privileges applicable to tables, views, and sequences in Oracle are:
                  B . REFERENCES can be granted only on tables. It allows the grantee to create a foreign key that refers to the table.
                  D . SELECT can be granted on tables and views. This allows the grantee to perform a SELECT on the table or view.
                  A, C, and E are incorrect. Specifically:
                  A is incorrect because DELETE cannot be granted on sequences; it is a privilege applicable to tables and views.
                  C is incorrect because INSERT cannot be granted on sequences; INSERT is applicable only to tables and views.
                  E is incorrect because ALTER is a privilege applicable to tables and indexes, not sequences.
                  Reference:
                  Oracle Database SQL Language Reference, 12c Release 1 (12.1): "GRANT"


                  質問 # 318
                  Which two statements are true regarding constraints?

                  正解：A、C


                  質問 # 319
                  See the Exhibit and examine the structure of the PROMOTIONS table:

                  Using the PROMOTIONS table, you need to find out the average cost for all promos in the range
                  $0-2000 and $2000-5000 in category A.
                  You issue the following SQL statements:

                  What would be the outcome?

                  正解：B

                  解説：
                  CASE Expression
                  Facilitates conditional inquiries by doing the work of an IF-THEN-ELSE statement:
                  CASE expr WHEN comparison_expr1 THEN return_expr1
                  [WHEN comparison_expr2 THEN return_expr2
                  WHEN comparison_exprn THEN return_exprn
                  ELSE else_expr]
                  END


                  質問 # 320
                  ......

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