Oracle 1z0-071 Exam Dumps - Actual Questions Answers

Queries that will execute successfully given the PRODUCT_STATUS table:

C. SELECT prod_id || q'('s not available)' "CURRENT AVAILABILITY" FROM product_status WHERE status = 'OUT OF STOCK';This query will execute successfully because it uses the q quote operator correctly to handle the inclusion of single quotes in the string.

D. SELECT prod_id || q'('s not available)' FROM product_status WHERE status = 'OUT OF STOCK';Similar to the previous query, it uses the q quote operator correctly and will execute without syntax errors.

Options A, B, E, and F are incorrect because of the incorrect or incomplete use of the quote operator:

A is incorrect because it has an additional single quote before the FROM clause.

B is incorrect because of a missing ending single quote after the q quote operator.

E and F are incorrect because they both use the q quote operator incorrectly; q’(’s not available)' is not a valid use of the quote operator, and q"'s not available" incorrectly uses double quotes instead of single quotes.

External tables using the ORACLE_DATAPUMP access driver have specific characteristics:

C. Creating an external table using the ORACLE_DATAPUMP access driver allows you to select data from other tables, including another external table or a regular table whose rows are stored in database blocks.

A, B, D, and E are incorrect. Specifically:

A is incorrect because creating an external table does not automatically create a directory object; the directory object must exist prior to or be created separately.

B is incorrect as it limits the creation to tables stored in database blocks, which is not a restriction.

D is incorrect because creating an external table does not create a dump file; it reads from an existing dump file created by Data Pump.

E is also incorrect because the dump file is not created as part of the external table creation process.

References:

Oracle Database SQL Language Reference, 12c Release 1 (12.1): "CREATE TABLE" for External Tables

For SQL queries involving set operations like UNION, UNION ALL, INTERSECT, and MINUS, the data types and number of columns in the SELECT statements being combined must be the same. Here is a breakdown of each query option:

Option A: This query successfully combines results from two tables using UNION ALL, which combines all rows from both SELECT statements, including duplicates. Both queries select two columns (prod_id and exp_date, with exp_date being NULL in the second query). This is valid as the number of columns and their data types match.

Option B: This query attempts to use INTERSECT, which returns only the rows common to both SELECT statements. However, the first SELECT statement chooses prod_id and prod_name, while the second only substitutes a constant value for prod_id without specifying from which table it selects prod_name. If "newproducts" (presumably a typo and should be "new_products") does not have the exact columns as "products", or if the data types do not match, it will fail.

Option C: This query uses UNION, which removes duplicates from the combined dataset. The use of SELECT * assumes that both "products" and "new_products" tables have the same columns in the same order with matching data types. This query will succeed if those conditions are met.

Option D: This query uses MINUS to subtract results of the second SELECT from the first. However, it fails because 'k' does not explicitly match a column name in "products", suggesting a potential error unless 'k' is indeed a valid column.

Option E: This query fails because the first SELECT statement fetches only one column (prod_id) while the second fetches two columns (prod_id and prod_name). UNION ALL requires the same number of columns with compatible types in all SELECT statements involved.