Analyst and Consultant Interview Questions and Answers

Query to delete null values in Oracle

• Use the DELETE statement with the IS NULL condition

• Specify the table name and column name in the WHERE clause

• Commit the changes after executing the query

Delete, drop, and truncate are SQL commands used to remove data from a table.

• DELETE command removes specific rows from a table

• DROP command removes an entire table from the database

• TRUNCATE command removes all rows from a table

Windows key in Oracle refers to the key used to access the Start menu and other Windows features while using Oracle applications.

• The Windows key can be used to quickly switch between Oracle applications and other open programs on the computer.

• Pressing the Windows key + D will minimize all open windows and show the desktop.

• The Windows key can also be used to open the Run dialog box and access various system settings.

• In Oracle applications, the Windows key can be used to access...read more

Fixed LOD is used to create a level of detail that remains constant regardless of the view's dimensions.

• Fixed LOD helps in maintaining a consistent level of detail in the visualization.

• It is useful when we want to focus on a specific aspect of the data.

• Fixed LOD can be used to create a reference line or a benchmark for comparison.

• For example, we can use fixed LOD to show the average sales for a specific category of products.