Querying Data with Transact-SQL — Question 79

Note: This question is part of a series of questions that use the same or similar answer choices. An answer choice may be correct for more than one question in the series. Each question is independent of the other questions in this series. Information and details provided in a question apply only to that question.
Multiple processes use the data from a table named Sales and place it in other databases across the organization. Some of the processes are not completely aware of the data types in the Sales table. This leads to data type conversion errors.
You need to implement a method that returns a NULL value id data conversion fails instead of throwing an error.
What should you implement?

Answer options

• A. the COALESCE function
• B. a view
• C. a table-valued function
• D. the TRY_PARSE function
• E. a stored procedure
• F. the ISNULL function
• G. a scalar function
• H. the TRY_CONVERT function

Correct answer: H

Explanation

The TRY_CONVERT function is designed to attempt a data type conversion and return NULL if the conversion fails, which is exactly what is needed in this scenario. Other options like COALESCE and ISNULL do not handle conversion errors but rather deal with NULL values after conversion. The TRY_PARSE function is similar but is primarily for converting data types to strings, not for handling various data type conversions.