1z1-071 Test Braindumps: Oracle Database SQL & 1z1-071 Exam Guide & 1z1-071 Study Guide

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Oracle 1z1-071 Exam Syllabus Topics:

SectionObjectives
Topic 1: Subqueries and Advanced SQL- Correlated subqueries and nested queries
- Single-row and multi-row subqueries
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: Data Manipulation and Schema Objects- DDL operations
          • 1. CREATE, ALTER, DROP tables and constraints
            - DML operations
            • 1. INSERT, UPDATE, DELETE, MERGE
              Topic 4: SQL Functions- Conversion and conditional functions
              • 1. TO_CHAR, TO_NUMBER, CASE expressions
                - Single-row functions
                • 1. Character, numeric, date functions
                  Topic 5: Relational Database Concepts- Data types and database objects overview
                  - Tables, rows, columns, and relational model basics

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                  Oracle Database SQL Sample Questions (Q379-Q384):

                  NEW QUESTION # 379
                  Which two statements execute successfully?

                  Answer: A,B

                  Explanation:
                  * A: This statement is correct. It uses the TO_DATE function with a proper date string, format mask, and
                  * NLS_DATE_LANGUAGE setting.
                  * B: This statement will not execute successfully because the syntax of the TO_CHAR function is incorrect. The date string should be a DATE data type when used with TO_CHAR, and the format mask and NLS parameter are incorrectly specified.
                  * C: This statement will not execute successfully because it is redundant to use TO_CHAR and then immediately convert it back to a date with TO_DATE without specifying a proper format mask.
                  * D: This statement is correct. It converts a string to a DATE using TO_DATE and then back to a string with TO_CHAR, without specifying a format which defaults to the session's NLS_DATE_FORMAT.
                  * E: This statement will not execute successfully because TO_CHAR is used incorrectly; the first argument must be of DATE data type when you're using a date format mask.
                  References for the TO_DATE and TO_CHAR functions and their proper usage can be found in the Oracle Database SQL Language Reference 12c documentation.


                  NEW QUESTION # 380
                  View the Exhibit and examine the details of PRODUCT_INFORMATIONtable.

                  You have the requirement to display PRODUCT_NAMEfrom the table where the CATEGORY_IDcolumn has values 12or 13, and the SUPPLIER_IDcolumn has the value 102088. You executed the following SQL statement:
                  SELECT product_name
                  FROM product_information
                  WHERE (category_id = 12 AND category_id = 13) AND supplier_id = 102088; Which statement is true regarding the execution of the query?

                  Answer: A


                  NEW QUESTION # 381
                  Examine this partial command:

                  Which two clauses are required for this command to execute successfully?

                  Answer: B,C

                  Explanation:
                  In Oracle Database 12c, when creating an external table using the CREATE TABLE ... ORGANIZATION EXTERNAL statement, there are certain clauses that are mandatory for the command to execute successfully.
                  Statement C, the LOCATION clause, is required. The LOCATION clause specifies one or more external data source locations, typically a file or a directory that the external table will read from. Without this, Oracle would not know where to find the external data for the table.
                  Statement E, the access driver TYPE clause, is also required. The access driver tells Oracle how to interpret the format of the data files. The most common access driver is ORACLE_LOADER, which allows the reading of data files in a format compatible with the SQL*Loader utility. Another option could be ORACLE_DATAPUMP, which reads data in a Data Pump format.
                  Statements A, B, and D are not strictly required for the command to execute successfully, although they are often used in practice:
                  A, the DEFAULT DIRECTORY clause, is not mandatory if you have specified the full path in the LOCATION clause, but it is a best practice to use it to avoid hard-coding directory paths in the LOCATION clause.
                  B, the REJECT LIMIT clause, is optional and specifies the maximum number of errors to allow during the loading of data. If not specified, the default is 0, meaning the load will fail upon the first error encountered.
                  D, the ACCESS PARAMETERS clause, is where one would specify parameters for the access driver, such as field delimiters and record formatting details. While it is common to include this clause to define the format of the external data, it is not absolutely required for the command to execute; defaults would be used if this clause is omitted.
                  For reference, you can find more details in the Oracle Database SQL Language Reference for version 12c, under the CREATE TABLE statement for external tables.


                  NEW QUESTION # 382
                  An Oracle database server session has an uncommitted transaction in progress which updated
                  5000 rows in a table.
                  In which three situations does the transactions complete thereby committing the updates?
                  (Choose three.)

                  Answer: B,C,E


                  NEW QUESTION # 383
                  Which four statements are true about constraints on Oracle tables?

                  Answer: A,C,E,G


                  NEW QUESTION # 384
                  ......

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