Oracle PL 1z0-071 Reddit Questions

B: True. The REFERENCES privilege can be granted on specific columns within a table. This is necessary when a user needs to define foreign key constraints that reference those particular columns.

C: True. The UPDATE privilege can be granted on specific columns, allowing users to update only designated columns within a table. This is useful for restricting write access to sensitive or critical data within a table.

F: True. The INSERT privilege can also be granted on specific columns, meaning a user can be permitted to insert data into only certain columns of a table. This helps in maintaining data integrity and controlling access to data fields based on user roles.

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.

When creating an external table, which allows you to access data in a flat file as though it is a table inside the database, certain clauses are required:

A. the ACCESS PARAMETERS clause: This clause specifies the parameters required by the access driver to read the data files.

D. the LOCATION clause: This clause specifies the location of the data files that make up the external table.

References:

Oracle Database SQL Language Reference 12c, particularly the sections detailing the creation and management of external tables.

The ORDER BY clause in Oracle SQL is used to sort the result set of a query by one or more columns, and it comes with its own set of rules and behaviors:

D. Column aliases can be used In the ORDER BY clause: True, column aliases that are specified in the SELECT clause can be used in the ORDER BY clause to refer to the columns to sort the results by.

E. In a character sort, the values are case-sensitive: Oracle sorts results in case-sensitive order by default when using the ORDER BY clause with character columns, unless otherwise specified by the NLS_SORT parameter.

References:

Oracle Database SQL Language Reference 12c, which provides details on sorting query results using ORDER BY.