NEW ORACLE 1Z1-071 TEST PDF & ACTUAL 1Z1-071 TEST

New Oracle 1z1-071 Test Pdf & Actual 1z1-071 Test

New Oracle 1z1-071 Test Pdf & Actual 1z1-071 Test

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Oracle Database SQL Sample Questions (Q195-Q200):

NEW QUESTION # 195
View the exhibit and examine the data in ORDERS_MASTER and MONTHLY_ORDERS tables.
ORDERS_MASTER
ORDER_ID
ORDER_TOTAL
1
1000
2
2000
3
3000
4
MONTHLY_ORDERS
ORDER_ID
ORDER_TOTAL
2
2500
3
Evaluate the following MERGE statement:
MERGE_INTO orders_master o
USING monthly_orders m
ON (o.order_id = m.order_id)
WHEN MATCHED THEN
UPDATE SET o.order_total = m.order_total
DELETE WHERE (m.order_total IS NULL)
WHEN NOT MATCHED THEN
INSERT VALUES (m.order_id, m.order_total)
What would be the outcome of the above statement?

  • A. The ORDERS_MASTER table would contain the ORDER_IDs 1 and 2.
  • B. The ORDERS_MASTER table would contain the ORDER_IDs 1, 2 and 3.
  • C. The ORDERS_MASTER table would contain the ORDER_IDs 1, 2, 3 and 4.
  • D. The ORDERS_MASTER table would contain the ORDER_IDs 1, 2 and 4.

Answer: D

Explanation:
References:
https://docs.oracle.com/cd/B28359_01/server.111/b28286/statements_9016.htm


NEW QUESTION # 196
Examine the description products table:

Examine the description of the new_projects table;

Which two queries execute successfully?

  • A.
  • B.
  • C.
  • D.
  • E.

Answer: D,E

Explanation:
To determine which queries will execute successfully, we need to consider the compatibility of the column definitions and the structure of the SELECT statements:
* Option A uses the MINUS set operator, which subtracts rows returned by the second SELECT statement from the rows returned by the first. For MINUS to work, the number and the order of columns and their data types must be the same in both queries. This query will not execute successfully because the second SELECT statement does not include all columns from the first SELECT statement, and the data types and sizes of PROD_ID do not match (CHAR(2) vs CHAR(4)).
* Option B uses the UNION ALL set operator, which appends the results of the second SELECT statement to the results of the first. Unlike UNION, UNION ALL does not eliminate duplicate rows.
This query will execute successfully because UNION ALL does not require the same data types or sizes, and the result will contain all columns from the first SELECT statement filled with NULL for non-matching columns from the second SELECT statement.
* Option C uses the UNION set operator, which requires the same number of columns and compatible data types. This query will not execute successfully because PROD_NAME has different data types (CHAR(4) vs VARCHAR2(10)), and the result of a UNION must have the same number of columns with compatible data types in the two SELECT statements.
* Option D uses the UNION set operator as well, but unlike Option C, it does not require a specific data type match because both SELECT statements include all columns and UNION is used (which will automatically handle type conversion where necessary). This query will execute successfully.
* Option E uses the INTERSECT set operator, which requires the same number and order of columns and their data types to be identical or compatible. This query will not execute successfully because the data types and sizes of PROD_ID do not match (CHAR(2) vs CHAR(4)).
References:
* Oracle Documentation on Set Operators: SQL Language Reference - Set Operators
* Oracle Documentation on Data Type Precedence: SQL Language Reference - Data Type Precedence In conclusion, only Option B and Option D will execute successfully because they adhere to the rules of the UNION ALL and UNION operators respectively, regarding column count and data type compatibility.


NEW QUESTION # 197
The sales table has columns prod_id and quantity_sold of data type number. Which two queries execute successfully?

  • A. SELECT prod_id FROM sales WHERE quantity_sold > 55000 AND
    COUNT(*) > 10 GROUP BY COUNT(*) > 10;
  • B. SELECT prod_id FROM sales WHERE quantity_sold > 55000 AND COUNT(*) > 10 GROUP BY prod_id HAVING COUNT(*) > 10;
  • C. SELECT prod Id FROH sales NHERE quantity sold > 55000 3RODI BY prod_id HAVING COUNT(*) > 10;
  • D. SELECT COUNT(prod_id) FROM sales WHERE quantity_sold > 55000 GROUP BY prod_id;
  • E. SELECT COUNT(prod_id) FROM sales GROUP BY prod_id WHERE quantity_sold > 55000;

Answer: C,D


NEW QUESTION # 198
Which two statements are true about substitution variables?

  • A. A substitution variable can be used only in a SELECT statement.
  • B. A substitution variable used to prompt for a column name must be endorsed in single quotation marks.
  • C. A substitution variable prefixed with 6 prompts only once for a value in a session unless is set to undefined in the session.
  • D. A substitution variable prefixed with & always prompts only once for a value in a session.
  • E. A substitution variable used to prompt for a column name must be endorsed in double quotation marks.
  • F. A substitution variable can be used with any clause in a SELECT statement.

Answer: D,F

Explanation:
Substitution variables in Oracle are used to replace a value dynamically during the execution of SQL statements. The behavior of these variables is well-documented:
C . A substitution variable prefixed with & always prompts only once for a value in a session: This is true. In a session, when you use a single ampersand (&), SQL*Plus or SQL Developer will prompt for the value the first time the variable is encountered. The value for this variable will then be reused for the remainder of the session unless it is redefined.
D . A substitution variable can be used with any clause in a SELECT statement: Substitution variables can be placed in any part of a SQL statement, including the SELECT, WHERE, GROUP BY, ORDER BY, etc. They are not limited to any specific clause.
Reference:
Oracle SQL*Plus User's Guide and Reference, which discusses substitution variables.


NEW QUESTION # 199
Which two statements are true about the data dictionary?

  • A. Views with the prefix all_ display metadata for objects to which the current user has access.
  • B. The data dictionary does not store metadata in tables.
  • C. Views with the prefix dba_ display only metadata for objects in the SYS schema.
  • D. The data dictionary is accessible when the database is closed.
  • E. Views with the prefix all_, dba_ and useb_ are not all available for every type of metadata.

Answer: A,E


NEW QUESTION # 200
......

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