1z0-061 最新な問題集、1z0-061 専門トレーリング

 

NO.1 View the Exhibit and examine the data in the PROJ_TASK_DETAILS table.
The PROJ_TASK_DETAILS table stores information about tasks involved in a project and the relation
between them.
The BASED_ON column indicates dependencies between tasks. Some tasks do not depend on the
completion of any other tasks.
You need to generate a report showing all task IDs, the corresponding task ID they are dependent on,
and the name of the employee in charge of the task it depends on.
Which query would give the required result?
A. SELECT p.task_id, p.based_on, d.task_in_charge FROM proj_task_details p JOIN proj_task_details d
ON (p.based_on = d.task_id);
B. SELECT p.task_id, p.based_on, d.task_in_charge FROM proj_task_details p JOIN proj_task_details d
ON (p.task_id = d.task_id);
C. SELECT p.task_id, p.based_on, d.task_in_charge
FROM proj_task_details p FULL OUTER JOIN proj_task_details d ON (p.based_on = d.task_id);
D. SELECT p.task_id, p.based_on, d.task_in_charge
FROM proj_task_details p LEFT OUTER JOIN proj_task_details d ON (p.based_on = d.task_id);
Answer: D

1z0-061 トレーニング   

NO.2 View the Exhibit and examine the structure of the SALES and PRODUCTS tables.
In the SALES table, PROD_ID is the foreign key referencing PROD_ID in the PRODUCTS table. You want
to list each product ID and the number of times it has been sold.
Evaluate the following query:
SQL>SELECT p.prod_id, COUNT(s.prod_id)
FROM products p _____________ sales s
ON p.prod_id = s.prod_id
GROUP BY p.prod_id;
Which two JOIN options can be used in the blank in the above query to get the required output?
(Choose two.)
A. FULL OUTER JOIN
B. RIGHT OUTER JOIN
C. LEFT OUTER JOIN
D. JOIN
Answer: A,C

1z0-061 独学   

NO.3 View the Exhibit and examine the structure of the PRODUCTS table.
Which two tasks would require subqueries? (Choose two.)
A. Display the total number of products supplied by supplier 102 and have product status as
'obsolete'.
B. Display the minimum list price for each product status.
C. Display all suppliers whose list price is less than 1000.
D. Display all products whose minimum list price is more than the average list price of products and
have the status 'orderable'.
E. Display the number of products whose list price is more than the average list price.
Answer: D,E

1z0-061 学校   

NO.4 Which two statements are true regarding the USING and ON clauses in table joins? (Choose
two.)
A. Both USING and ON clause can be used for equijoins and nonequijoins
B. The ON clause can be used to join tables on columns that have different names but compatible
data types
C. A maximum of one pair of columns can be joined between two tables using the ON clause
D. The WHERE clause can be used to apply additional conditions in SELECT statement containing the
ON or the USING clause
Answer: B,D

1z0-061 研修   1z0-061 受験料   
Explanation:
Creating Joins with the USING Clause
If several columns have the same names but the data types do not match, use the USING clause to
specify the columns for the equijoin. Use the USING clause to match only one column when more
than one column matches. The NATURAL JOIN and USING clauses are mutually exclusive Using Table
Aliases with the USING clause When joining with the USING clause, you cannot qualify a column that
is used in the USING
clause itself. Furthermore, if that column is used anywhere in the SQL statement, you cannot alias it.
For example, in the query mentioned in the slide, you should not alias the location_id column in the
WHERE clause because the column is used in the USING clause.
The columns that are referenced in the USING clause should not have a qualifier (table name oralias)
anywhere in the SQL statement. Creating Joins with the ON Clause The join condition for the natural
join is basically an equijoin of all columns with the same name. Use the ON clause to specify arbitrary
conditions or specify columns to join. - ANSWER C The join condition is separated from other search
conditions. ANSWER D The ON clause makes code easy to understand.

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1z0-061試験番号:1z0-061 最新試験情報
試験科目:「Oracle Database 12c: SQL Fundamentals」
最近更新時間:2017-06-11
問題と解答:312

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